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Finding the Fourth Proportional to 98,737.86, 136,209.96 and 64,731.36

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Solution

The fourth proportional to 98,737.86, 136,209.96 and 64,731.36 is: 89,297.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,737.86 : 136,209.96 = 64,731.36 : x
  2. Step 2: Convert to fraction form
    98,737.86/136,209.96 = 64,731.36/x
  3. Step 3: Cross multiply
    98,737.86x = 136,209.96 × 64,731.36
  4. Step 4: Simplify right side
    98,737.86x = 8,817,055,956.35
  5. Step 5: Solve for x
    x = 8,817,055,956.35/98,737.86
  6. Step 6: Final answer
    x = 89,297.62

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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.