Home / 129,250.47-178,352.01-71,880.48

Finding the Fourth Proportional to 129,250.47, 178,352.01 and 71,880.48

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Solution

The fourth proportional to 129,250.47, 178,352.01 and 71,880.48 is: 99,187.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,250.47 : 178,352.01 = 71,880.48 : x
  2. Step 2: Convert to fraction form
    129,250.47/178,352.01 = 71,880.48/x
  3. Step 3: Cross multiply
    129,250.47x = 178,352.01 × 71,880.48
  4. Step 4: Simplify right side
    129,250.47x = 12,820,028,087.76
  5. Step 5: Solve for x
    x = 12,820,028,087.76/129,250.47
  6. Step 6: Final answer
    x = 99,187.48

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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.