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Finding the Fourth Proportional to 153,242.91, 211,456.85 and 85,242.71

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Solution

The fourth proportional to 153,242.91, 211,456.85 and 85,242.71 is: 117,624.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,242.91 : 211,456.85 = 85,242.71 : x
  2. Step 2: Convert to fraction form
    153,242.91/211,456.85 = 85,242.71/x
  3. Step 3: Cross multiply
    153,242.91x = 211,456.85 × 85,242.71
  4. Step 4: Simplify right side
    153,242.91x = 18,025,155,044.49
  5. Step 5: Solve for x
    x = 18,025,155,044.49/153,242.91
  6. Step 6: Final answer
    x = 117,624.72

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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.