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Finding the Fourth Proportional to 62,875.68, 86,781.64 and 39,890.56

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Solution

The fourth proportional to 62,875.68, 86,781.64 and 39,890.56 is: 55,057.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,875.68 : 86,781.64 = 39,890.56 : x
  2. Step 2: Convert to fraction form
    62,875.68/86,781.64 = 39,890.56/x
  3. Step 3: Cross multiply
    62,875.68x = 86,781.64 × 39,890.56
  4. Step 4: Simplify right side
    62,875.68x = 3,461,768,217.32
  5. Step 5: Solve for x
    x = 3,461,768,217.32/62,875.68
  6. Step 6: Final answer
    x = 55,057.35

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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.