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Finding the Fourth Proportional to 99,639, 137,490.84 and 59,347.26

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Solution

The fourth proportional to 99,639, 137,490.84 and 59,347.26 is: 81,892.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,639 : 137,490.84 = 59,347.26 : x
  2. Step 2: Convert to fraction form
    99,639/137,490.84 = 59,347.26/x
  3. Step 3: Cross multiply
    99,639x = 137,490.84 × 59,347.26
  4. Step 4: Simplify right side
    99,639x = 8,159,704,629.10
  5. Step 5: Solve for x
    x = 8,159,704,629.10/99,639
  6. Step 6: Final answer
    x = 81,892.68

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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.