Home / 129,438.02-178,619.63-72,079.38

Finding the Fourth Proportional to 129,438.02, 178,619.63 and 72,079.38

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Solution

The fourth proportional to 129,438.02, 178,619.63 and 72,079.38 is: 99,466.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,438.02 : 178,619.63 = 72,079.38 : x
  2. Step 2: Convert to fraction form
    129,438.02/178,619.63 = 72,079.38/x
  3. Step 3: Cross multiply
    129,438.02x = 178,619.63 × 72,079.38
  4. Step 4: Simplify right side
    129,438.02x = 12,874,791,825.83
  5. Step 5: Solve for x
    x = 12,874,791,825.83/129,438.02
  6. Step 6: Final answer
    x = 99,466.85

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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.