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Finding the Fourth Proportional to 153,793.38, 212,235 and 90,131.24

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Solution

The fourth proportional to 153,793.38, 212,235 and 90,131.24 is: 124,381.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,793.38 : 212,235 = 90,131.24 : x
  2. Step 2: Convert to fraction form
    153,793.38/212,235 = 90,131.24/x
  3. Step 3: Cross multiply
    153,793.38x = 212,235 × 90,131.24
  4. Step 4: Simplify right side
    153,793.38x = 19,129,003,721.40
  5. Step 5: Solve for x
    x = 19,129,003,721.40/153,793.38
  6. Step 6: Final answer
    x = 124,381.19

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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.