Home / 85,497.31-128,248.13-40,508.12

Finding the Fourth Proportional to 85,497.31, 128,248.13 and 40,508.12

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Solution

The fourth proportional to 85,497.31, 128,248.13 and 40,508.12 is: 60,763.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,497.31 : 128,248.13 = 40,508.12 : x
  2. Step 2: Convert to fraction form
    85,497.31/128,248.13 = 40,508.12/x
  3. Step 3: Cross multiply
    85,497.31x = 128,248.13 × 40,508.12
  4. Step 4: Simplify right side
    85,497.31x = 5,195,090,639.82
  5. Step 5: Solve for x
    x = 5,195,090,639.82/85,497.31
  6. Step 6: Final answer
    x = 60,763.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.