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Finding the Fourth Proportional to 81,812.68, 113,102.70 and 81,064.24

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Solution

The fourth proportional to 81,812.68, 113,102.70 and 81,064.24 is: 112,068.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,812.68 : 113,102.70 = 81,064.24 : x
  2. Step 2: Convert to fraction form
    81,812.68/113,102.70 = 81,064.24/x
  3. Step 3: Cross multiply
    81,812.68x = 113,102.70 × 81,064.24
  4. Step 4: Simplify right side
    81,812.68x = 9,168,584,417.45
  5. Step 5: Solve for x
    x = 9,168,584,417.45/81,812.68
  6. Step 6: Final answer
    x = 112,068.01

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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.