Home / 129,028.92-178,055.34-72,442.68

Finding the Fourth Proportional to 129,028.92, 178,055.34 and 72,442.68

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Solution

The fourth proportional to 129,028.92, 178,055.34 and 72,442.68 is: 99,968.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,028.92 : 178,055.34 = 72,442.68 : x
  2. Step 2: Convert to fraction form
    129,028.92/178,055.34 = 72,442.68/x
  3. Step 3: Cross multiply
    129,028.92x = 178,055.34 × 72,442.68
  4. Step 4: Simplify right side
    129,028.92x = 12,898,806,017.91
  5. Step 5: Solve for x
    x = 12,898,806,017.91/129,028.92
  6. Step 6: Final answer
    x = 99,968.33

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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.