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Finding the Fourth Proportional to 130,990.72, 180,767.19 and 71,374.72

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Solution

The fourth proportional to 130,990.72, 180,767.19 and 71,374.72 is: 98,497.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,990.72 : 180,767.19 = 71,374.72 : x
  2. Step 2: Convert to fraction form
    130,990.72/180,767.19 = 71,374.72/x
  3. Step 3: Cross multiply
    130,990.72x = 180,767.19 × 71,374.72
  4. Step 4: Simplify right side
    130,990.72x = 12,902,207,571.44
  5. Step 5: Solve for x
    x = 12,902,207,571.44/130,990.72
  6. Step 6: Final answer
    x = 98,497.11

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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.