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Finding the Fourth Proportional to 61,152.60, 91,728.90 and 54,737.40

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Solution

The fourth proportional to 61,152.60, 91,728.90 and 54,737.40 is: 82,106.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,152.60 : 91,728.90 = 54,737.40 : x
  2. Step 2: Convert to fraction form
    61,152.60/91,728.90 = 54,737.40/x
  3. Step 3: Cross multiply
    61,152.60x = 91,728.90 × 54,737.40
  4. Step 4: Simplify right side
    61,152.60x = 5,021,001,490.86
  5. Step 5: Solve for x
    x = 5,021,001,490.86/61,152.60
  6. Step 6: Final answer
    x = 82,106.10

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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.