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Finding the Fourth Proportional to 80,739, 121,128.08 and 25,335

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Solution

The fourth proportional to 80,739, 121,128.08 and 25,335 is: 38,008.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,739 : 121,128.08 = 25,335 : x
  2. Step 2: Convert to fraction form
    80,739/121,128.08 = 25,335/x
  3. Step 3: Cross multiply
    80,739x = 121,128.08 × 25,335
  4. Step 4: Simplify right side
    80,739x = 3,068,779,780.13
  5. Step 5: Solve for x
    x = 3,068,779,780.13/80,739
  6. Step 6: Final answer
    x = 38,008.64

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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.