Home / 129,428.44-178,666.34-87,011.57

Finding the Fourth Proportional to 129,428.44, 178,666.34 and 87,011.57

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Solution

The fourth proportional to 129,428.44, 178,666.34 and 87,011.57 is: 120,113.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,428.44 : 178,666.34 = 87,011.57 : x
  2. Step 2: Convert to fraction form
    129,428.44/178,666.34 = 87,011.57/x
  3. Step 3: Cross multiply
    129,428.44x = 178,666.34 × 87,011.57
  4. Step 4: Simplify right side
    129,428.44x = 15,546,038,761.16
  5. Step 5: Solve for x
    x = 15,546,038,761.16/129,428.44
  6. Step 6: Final answer
    x = 120,113.01

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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.