Home / 129,436.95-178,554.48-89,080.65

Finding the Fourth Proportional to 129,436.95, 178,554.48 and 89,080.65

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Solution

The fourth proportional to 129,436.95, 178,554.48 and 89,080.65 is: 122,884.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,436.95 : 178,554.48 = 89,080.65 : x
  2. Step 2: Convert to fraction form
    129,436.95/178,554.48 = 89,080.65/x
  3. Step 3: Cross multiply
    129,436.95x = 178,554.48 × 89,080.65
  4. Step 4: Simplify right side
    129,436.95x = 15,905,749,138.81
  5. Step 5: Solve for x
    x = 15,905,749,138.81/129,436.95
  6. Step 6: Final answer
    x = 122,884.15

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1.5x scale

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.