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Finding the Fourth Proportional to 76,239.60, 105,207.56 and 42,248.60

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Solution

The fourth proportional to 76,239.60, 105,207.56 and 42,248.60 is: 58,301.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,239.60 : 105,207.56 = 42,248.60 : x
  2. Step 2: Convert to fraction form
    76,239.60/105,207.56 = 42,248.60/x
  3. Step 3: Cross multiply
    76,239.60x = 105,207.56 × 42,248.60
  4. Step 4: Simplify right side
    76,239.60x = 4,444,872,119.42
  5. Step 5: Solve for x
    x = 4,444,872,119.42/76,239.60
  6. Step 6: Final answer
    x = 58,301.36

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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.