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Finding the Fourth Proportional to 129,888.98, 179,370.58 and 122,812.71

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Solution

The fourth proportional to 129,888.98, 179,370.58 and 122,812.71 is: 169,598.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,888.98 : 179,370.58 = 122,812.71 : x
  2. Step 2: Convert to fraction form
    129,888.98/179,370.58 = 122,812.71/x
  3. Step 3: Cross multiply
    129,888.98x = 179,370.58 × 122,812.71
  4. Step 4: Simplify right side
    129,888.98x = 22,028,985,513.16
  5. Step 5: Solve for x
    x = 22,028,985,513.16/129,888.98
  6. Step 6: Final answer
    x = 169,598.58

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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.