Home / 129,502.80-178,643.88-89,145.36

Finding the Fourth Proportional to 129,502.80, 178,643.88 and 89,145.36

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Solution

The fourth proportional to 129,502.80, 178,643.88 and 89,145.36 is: 122,972.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,502.80 : 178,643.88 = 89,145.36 : x
  2. Step 2: Convert to fraction form
    129,502.80/178,643.88 = 89,145.36/x
  3. Step 3: Cross multiply
    129,502.80x = 178,643.88 × 89,145.36
  4. Step 4: Simplify right side
    129,502.80x = 15,925,272,994.40
  5. Step 5: Solve for x
    x = 15,925,272,994.40/129,502.80
  6. Step 6: Final answer
    x = 122,972.42

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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.