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Finding the Fourth Proportional to 66,699.60, 92,057.76 and 42,856.08

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Solution

The fourth proportional to 66,699.60, 92,057.76 and 42,856.08 is: 59,149.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,699.60 : 92,057.76 = 42,856.08 : x
  2. Step 2: Convert to fraction form
    66,699.60/92,057.76 = 42,856.08/x
  3. Step 3: Cross multiply
    66,699.60x = 92,057.76 × 42,856.08
  4. Step 4: Simplify right side
    66,699.60x = 3,945,234,727.18
  5. Step 5: Solve for x
    x = 3,945,234,727.18/66,699.60
  6. Step 6: Final answer
    x = 59,149.30

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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.