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Finding the Fourth Proportional to 100,347.96, 138,366.66 and 64,000.80

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Solution

The fourth proportional to 100,347.96, 138,366.66 and 64,000.80 is: 88,248.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,347.96 : 138,366.66 = 64,000.80 : x
  2. Step 2: Convert to fraction form
    100,347.96/138,366.66 = 64,000.80/x
  3. Step 3: Cross multiply
    100,347.96x = 138,366.66 × 64,000.80
  4. Step 4: Simplify right side
    100,347.96x = 8,855,576,933.33
  5. Step 5: Solve for x
    x = 8,855,576,933.33/100,347.96
  6. Step 6: Final answer
    x = 88,248.70

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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.