Home / 102,387.52-141,167.28-85,416.40

Finding the Fourth Proportional to 102,387.52, 141,167.28 and 85,416.40

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Solution

The fourth proportional to 102,387.52, 141,167.28 and 85,416.40 is: 117,768.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,387.52 : 141,167.28 = 85,416.40 : x
  2. Step 2: Convert to fraction form
    102,387.52/141,167.28 = 85,416.40/x
  3. Step 3: Cross multiply
    102,387.52x = 141,167.28 × 85,416.40
  4. Step 4: Simplify right side
    102,387.52x = 12,058,000,855.39
  5. Step 5: Solve for x
    x = 12,058,000,855.39/102,387.52
  6. Step 6: Final answer
    x = 117,768.27

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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.