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Finding the Fourth Proportional to 62,985.68, 86,920.14 and 34,691

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Solution

The fourth proportional to 62,985.68, 86,920.14 and 34,691 is: 47,873.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,985.68 : 86,920.14 = 34,691 : x
  2. Step 2: Convert to fraction form
    62,985.68/86,920.14 = 34,691/x
  3. Step 3: Cross multiply
    62,985.68x = 86,920.14 × 34,691
  4. Step 4: Simplify right side
    62,985.68x = 3,015,346,576.74
  5. Step 5: Solve for x
    x = 3,015,346,576.74/62,985.68
  6. Step 6: Final answer
    x = 47,873.53

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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.