Home / 81,720.16-112,802.40-48,184

Finding the Fourth Proportional to 81,720.16, 112,802.40 and 48,184

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Solution

The fourth proportional to 81,720.16, 112,802.40 and 48,184 is: 66,510.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.16 : 112,802.40 = 48,184 : x
  2. Step 2: Convert to fraction form
    81,720.16/112,802.40 = 48,184/x
  3. Step 3: Cross multiply
    81,720.16x = 112,802.40 × 48,184
  4. Step 4: Simplify right side
    81,720.16x = 5,435,270,841.60
  5. Step 5: Solve for x
    x = 5,435,270,841.60/81,720.16
  6. Step 6: Final answer
    x = 66,510.77

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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.