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Finding the Fourth Proportional to 66,461.87, 91,665.52 and 42,590.76

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Solution

The fourth proportional to 66,461.87, 91,665.52 and 42,590.76 is: 58,742.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.87 : 91,665.52 = 42,590.76 : x
  2. Step 2: Convert to fraction form
    66,461.87/91,665.52 = 42,590.76/x
  3. Step 3: Cross multiply
    66,461.87x = 91,665.52 × 42,590.76
  4. Step 4: Simplify right side
    66,461.87x = 3,904,104,056.12
  5. Step 5: Solve for x
    x = 3,904,104,056.12/66,461.87
  6. Step 6: Final answer
    x = 58,742.02

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1.5x scale

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.