Home / 129,202.46-178,277.72-71,840.15

Finding the Fourth Proportional to 129,202.46, 178,277.72 and 71,840.15

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Solution

The fourth proportional to 129,202.46, 178,277.72 and 71,840.15 is: 99,127.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,202.46 : 178,277.72 = 71,840.15 : x
  2. Step 2: Convert to fraction form
    129,202.46/178,277.72 = 71,840.15/x
  3. Step 3: Cross multiply
    129,202.46x = 178,277.72 × 71,840.15
  4. Step 4: Simplify right side
    129,202.46x = 12,807,496,895.87
  5. Step 5: Solve for x
    x = 12,807,496,895.87/129,202.46
  6. Step 6: Final answer
    x = 99,127.35

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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.