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Finding the Fourth Proportional to 145,278.88, 217,786.80 and 100,926.40

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Solution

The fourth proportional to 145,278.88, 217,786.80 and 100,926.40 is: 151,298.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,278.88 : 217,786.80 = 100,926.40 : x
  2. Step 2: Convert to fraction form
    145,278.88/217,786.80 = 100,926.40/x
  3. Step 3: Cross multiply
    145,278.88x = 217,786.80 × 100,926.40
  4. Step 4: Simplify right side
    145,278.88x = 21,980,437,691.52
  5. Step 5: Solve for x
    x = 21,980,437,691.52/145,278.88
  6. Step 6: Final answer
    x = 151,298.23

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1.5x scale

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.