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Finding the Fourth Proportional to 61,148.79, 91,732.30 and 21,702.60

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Solution

The fourth proportional to 61,148.79, 91,732.30 and 21,702.60 is: 32,557.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,148.79 : 91,732.30 = 21,702.60 : x
  2. Step 2: Convert to fraction form
    61,148.79/91,732.30 = 21,702.60/x
  3. Step 3: Cross multiply
    61,148.79x = 91,732.30 × 21,702.60
  4. Step 4: Simplify right side
    61,148.79x = 1,990,829,076.14
  5. Step 5: Solve for x
    x = 1,990,829,076.14/61,148.79
  6. Step 6: Final answer
    x = 32,557.13

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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.