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Finding the Fourth Proportional to 153,149.70, 211,330.40 and 85,155.71

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Solution

The fourth proportional to 153,149.70, 211,330.40 and 85,155.71 is: 117,505.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,149.70 : 211,330.40 = 85,155.71 : x
  2. Step 2: Convert to fraction form
    153,149.70/211,330.40 = 85,155.71/x
  3. Step 3: Cross multiply
    153,149.70x = 211,330.40 × 85,155.71
  4. Step 4: Simplify right side
    153,149.70x = 17,995,989,612.40
  5. Step 5: Solve for x
    x = 17,995,989,612.40/153,149.70
  6. Step 6: Final answer
    x = 117,505.88

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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.