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Finding the Fourth Proportional to 157,431.66, 217,132.80 and 100,848.30

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Solution

The fourth proportional to 157,431.66, 217,132.80 and 100,848.30 is: 139,091.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,431.66 : 217,132.80 = 100,848.30 : x
  2. Step 2: Convert to fraction form
    157,431.66/217,132.80 = 100,848.30/x
  3. Step 3: Cross multiply
    157,431.66x = 217,132.80 × 100,848.30
  4. Step 4: Simplify right side
    157,431.66x = 21,897,473,754.24
  5. Step 5: Solve for x
    x = 21,897,473,754.24/157,431.66
  6. Step 6: Final answer
    x = 139,091.93

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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.