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Finding the Fourth Proportional to 67,987.52, 93,829.44 and 39,308.40

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Solution

The fourth proportional to 67,987.52, 93,829.44 and 39,308.40 is: 54,249.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,987.52 : 93,829.44 = 39,308.40 : x
  2. Step 2: Convert to fraction form
    67,987.52/93,829.44 = 39,308.40/x
  3. Step 3: Cross multiply
    67,987.52x = 93,829.44 × 39,308.40
  4. Step 4: Simplify right side
    67,987.52x = 3,688,285,159.30
  5. Step 5: Solve for x
    x = 3,688,285,159.30/67,987.52
  6. Step 6: Final answer
    x = 54,249.44

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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.