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Finding the Fourth Proportional to 91,998.50, 138,041.32 and 38,702.16

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Solution

The fourth proportional to 91,998.50, 138,041.32 and 38,702.16 is: 58,071.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,998.50 : 138,041.32 = 38,702.16 : x
  2. Step 2: Convert to fraction form
    91,998.50/138,041.32 = 38,702.16/x
  3. Step 3: Cross multiply
    91,998.50x = 138,041.32 × 38,702.16
  4. Step 4: Simplify right side
    91,998.50x = 5,342,497,253.25
  5. Step 5: Solve for x
    x = 5,342,497,253.25/91,998.50
  6. Step 6: Final answer
    x = 58,071.57

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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.