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Finding the Fourth Proportional to 60,477.35, 90,731.36 and 42,742.90

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Solution

The fourth proportional to 60,477.35, 90,731.36 and 42,742.90 is: 64,125.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,477.35 : 90,731.36 = 42,742.90 : x
  2. Step 2: Convert to fraction form
    60,477.35/90,731.36 = 42,742.90/x
  3. Step 3: Cross multiply
    60,477.35x = 90,731.36 × 42,742.90
  4. Step 4: Simplify right side
    60,477.35x = 3,878,121,006.80
  5. Step 5: Solve for x
    x = 3,878,121,006.80/60,477.35
  6. Step 6: Final answer
    x = 64,125.19

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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.