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Finding the Fourth Proportional to 129,339, 178,498.08 and 72,754.56

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Solution

The fourth proportional to 129,339, 178,498.08 and 72,754.56 is: 100,407.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,339 : 178,498.08 = 72,754.56 : x
  2. Step 2: Convert to fraction form
    129,339/178,498.08 = 72,754.56/x
  3. Step 3: Cross multiply
    129,339x = 178,498.08 × 72,754.56
  4. Step 4: Simplify right side
    129,339x = 12,986,549,271.24
  5. Step 5: Solve for x
    x = 12,986,549,271.24/129,339
  6. Step 6: Final answer
    x = 100,407.06

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.