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Finding the Fourth Proportional to 81,060, 121,590.54 and 25,656

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Solution

The fourth proportional to 81,060, 121,590.54 and 25,656 is: 38,484.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,060 : 121,590.54 = 25,656 : x
  2. Step 2: Convert to fraction form
    81,060/121,590.54 = 25,656/x
  3. Step 3: Cross multiply
    81,060x = 121,590.54 × 25,656
  4. Step 4: Simplify right side
    81,060x = 3,119,526,894.24
  5. Step 5: Solve for x
    x = 3,119,526,894.24/81,060
  6. Step 6: Final answer
    x = 38,484.17

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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.