Home / 81,660.76-112,688.20-45,850.12

Finding the Fourth Proportional to 81,660.76, 112,688.20 and 45,850.12

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Solution

The fourth proportional to 81,660.76, 112,688.20 and 45,850.12 is: 63,271.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,660.76 : 112,688.20 = 45,850.12 : x
  2. Step 2: Convert to fraction form
    81,660.76/112,688.20 = 45,850.12/x
  3. Step 3: Cross multiply
    81,660.76x = 112,688.20 × 45,850.12
  4. Step 4: Simplify right side
    81,660.76x = 5,166,767,492.58
  5. Step 5: Solve for x
    x = 5,166,767,492.58/81,660.76
  6. Step 6: Final answer
    x = 63,271.12

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Double scale
Find fourth proportional to 81,661.76, 112,689.58 and 45,851.12
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.