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Finding the Fourth Proportional to 154,663.43, 213,425.43 and 90,988.93

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Solution

The fourth proportional to 154,663.43, 213,425.43 and 90,988.93 is: 125,558.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,663.43 : 213,425.43 = 90,988.93 : x
  2. Step 2: Convert to fraction form
    154,663.43/213,425.43 = 90,988.93/x
  3. Step 3: Cross multiply
    154,663.43x = 213,425.43 × 90,988.93
  4. Step 4: Simplify right side
    154,663.43x = 19,419,350,443.36
  5. Step 5: Solve for x
    x = 19,419,350,443.36/154,663.43
  6. Step 6: Final answer
    x = 125,558.77

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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.