Home / 129,636.75-179,047.68-86,541.21

Finding the Fourth Proportional to 129,636.75, 179,047.68 and 86,541.21

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Solution

The fourth proportional to 129,636.75, 179,047.68 and 86,541.21 is: 119,526.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,636.75 : 179,047.68 = 86,541.21 : x
  2. Step 2: Convert to fraction form
    129,636.75/179,047.68 = 86,541.21/x
  3. Step 3: Cross multiply
    129,636.75x = 179,047.68 × 86,541.21
  4. Step 4: Simplify right side
    129,636.75x = 15,495,002,874.89
  5. Step 5: Solve for x
    x = 15,495,002,874.89/129,636.75
  6. Step 6: Final answer
    x = 119,526.31

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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.