Home / 129,058.68-178,102.08-72,475.32

Finding the Fourth Proportional to 129,058.68, 178,102.08 and 72,475.32

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Solution

The fourth proportional to 129,058.68, 178,102.08 and 72,475.32 is: 100,016.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,058.68 : 178,102.08 = 72,475.32 : x
  2. Step 2: Convert to fraction form
    129,058.68/178,102.08 = 72,475.32/x
  3. Step 3: Cross multiply
    129,058.68x = 178,102.08 × 72,475.32
  4. Step 4: Simplify right side
    129,058.68x = 12,908,005,240.67
  5. Step 5: Solve for x
    x = 12,908,005,240.67/129,058.68
  6. Step 6: Final answer
    x = 100,016.56

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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.