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Finding the Fourth Proportional to 60,815.70, 91,419.70 and 56,393.86

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Solution

The fourth proportional to 60,815.70, 91,419.70 and 56,393.86 is: 84,772.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,815.70 : 91,419.70 = 56,393.86 : x
  2. Step 2: Convert to fraction form
    60,815.70/91,419.70 = 56,393.86/x
  3. Step 3: Cross multiply
    60,815.70x = 91,419.70 × 56,393.86
  4. Step 4: Simplify right side
    60,815.70x = 5,155,509,763.04
  5. Step 5: Solve for x
    x = 5,155,509,763.04/60,815.70
  6. Step 6: Final answer
    x = 84,772.68

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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.