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Finding the Fourth Proportional to 71,459.64, 98,621.46 and 39,634.74

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Solution

The fourth proportional to 71,459.64, 98,621.46 and 39,634.74 is: 54,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,459.64 : 98,621.46 = 39,634.74 : x
  2. Step 2: Convert to fraction form
    71,459.64/98,621.46 = 39,634.74/x
  3. Step 3: Cross multiply
    71,459.64x = 98,621.46 × 39,634.74
  4. Step 4: Simplify right side
    71,459.64x = 3,908,835,925.52
  5. Step 5: Solve for x
    x = 3,908,835,925.52/71,459.64
  6. Step 6: Final answer
    x = 54,699.91

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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.