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Finding the Fourth Proportional to 502,645.48, 753,967.74 and 128,667.88

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Solution

The fourth proportional to 502,645.48, 753,967.74 and 128,667.88 is: 193,001.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,645.48 : 753,967.74 = 128,667.88 : x
  2. Step 2: Convert to fraction form
    502,645.48/753,967.74 = 128,667.88/x
  3. Step 3: Cross multiply
    502,645.48x = 753,967.74 × 128,667.88
  4. Step 4: Simplify right side
    502,645.48x = 97,011,430,694.19
  5. Step 5: Solve for x
    x = 97,011,430,694.19/502,645.48
  6. Step 6: Final answer
    x = 193,001.70

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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.