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Finding the Fourth Proportional to 101,966.15, 153,003.90 and 42,807.80

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Solution

The fourth proportional to 101,966.15, 153,003.90 and 42,807.80 is: 64,234.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,966.15 : 153,003.90 = 42,807.80 : x
  2. Step 2: Convert to fraction form
    101,966.15/153,003.90 = 42,807.80/x
  3. Step 3: Cross multiply
    101,966.15x = 153,003.90 × 42,807.80
  4. Step 4: Simplify right side
    101,966.15x = 6,549,760,350.42
  5. Step 5: Solve for x
    x = 6,549,760,350.42/101,966.15
  6. Step 6: Final answer
    x = 64,234.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.