Home / 129,503.80-178,645.26-89,146.36

Finding the Fourth Proportional to 129,503.80, 178,645.26 and 89,146.36

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Solution

The fourth proportional to 129,503.80, 178,645.26 and 89,146.36 is: 122,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,503.80 : 178,645.26 = 89,146.36 : x
  2. Step 2: Convert to fraction form
    129,503.80/178,645.26 = 89,146.36/x
  3. Step 3: Cross multiply
    129,503.80x = 178,645.26 × 89,146.36
  4. Step 4: Simplify right side
    129,503.80x = 15,925,574,660.25
  5. Step 5: Solve for x
    x = 15,925,574,660.25/129,503.80
  6. Step 6: Final answer
    x = 122,973.80

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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.