Home / 78,213.34-117,249.84-28,281.70

Finding the Fourth Proportional to 78,213.34, 117,249.84 and 28,281.70

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Solution

The fourth proportional to 78,213.34, 117,249.84 and 28,281.70 is: 42,397.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,213.34 : 117,249.84 = 28,281.70 : x
  2. Step 2: Convert to fraction form
    78,213.34/117,249.84 = 28,281.70/x
  3. Step 3: Cross multiply
    78,213.34x = 117,249.84 × 28,281.70
  4. Step 4: Simplify right side
    78,213.34x = 3,316,024,506.80
  5. Step 5: Solve for x
    x = 3,316,024,506.80/78,213.34
  6. Step 6: Final answer
    x = 42,397.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.