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Finding the Fourth Proportional to 129,444.98, 178,622.70 and 72,079.97

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Solution

The fourth proportional to 129,444.98, 178,622.70 and 72,079.97 is: 99,464.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,444.98 : 178,622.70 = 72,079.97 : x
  2. Step 2: Convert to fraction form
    129,444.98/178,622.70 = 72,079.97/x
  3. Step 3: Cross multiply
    129,444.98x = 178,622.70 × 72,079.97
  4. Step 4: Simplify right side
    129,444.98x = 12,875,118,857.32
  5. Step 5: Solve for x
    x = 12,875,118,857.32/129,444.98
  6. Step 6: Final answer
    x = 99,464.03

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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.