Home / 129,240.64-178,368.15-72,652.06

Finding the Fourth Proportional to 129,240.64, 178,368.15 and 72,652.06

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Solution

The fourth proportional to 129,240.64, 178,368.15 and 72,652.06 is: 100,268.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,240.64 : 178,368.15 = 72,652.06 : x
  2. Step 2: Convert to fraction form
    129,240.64/178,368.15 = 72,652.06/x
  3. Step 3: Cross multiply
    129,240.64x = 178,368.15 × 72,652.06
  4. Step 4: Simplify right side
    129,240.64x = 12,958,813,535.89
  5. Step 5: Solve for x
    x = 12,958,813,535.89/129,240.64
  6. Step 6: Final answer
    x = 100,268.87

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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.