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Finding the Fourth Proportional to 99,671.64, 137,531.16 and 59,384.40

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Solution

The fourth proportional to 99,671.64, 137,531.16 and 59,384.40 is: 81,941.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,671.64 : 137,531.16 = 59,384.40 : x
  2. Step 2: Convert to fraction form
    99,671.64/137,531.16 = 59,384.40/x
  3. Step 3: Cross multiply
    99,671.64x = 137,531.16 × 59,384.40
  4. Step 4: Simplify right side
    99,671.64x = 8,167,205,417.90
  5. Step 5: Solve for x
    x = 8,167,205,417.90/99,671.64
  6. Step 6: Final answer
    x = 81,941.12

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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.