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Finding the Fourth Proportional to 81,061, 121,592.04 and 25,657

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Solution

The fourth proportional to 81,061, 121,592.04 and 25,657 is: 38,485.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,061 : 121,592.04 = 25,657 : x
  2. Step 2: Convert to fraction form
    81,061/121,592.04 = 25,657/x
  3. Step 3: Cross multiply
    81,061x = 121,592.04 × 25,657
  4. Step 4: Simplify right side
    81,061x = 3,119,686,970.28
  5. Step 5: Solve for x
    x = 3,119,686,970.28/81,061
  6. Step 6: Final answer
    x = 38,485.67

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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.