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Finding the Fourth Proportional to 72,685.67, 109,030.55 and 20,095.15

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Solution

The fourth proportional to 72,685.67, 109,030.55 and 20,095.15 is: 30,143.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,685.67 : 109,030.55 = 20,095.15 : x
  2. Step 2: Convert to fraction form
    72,685.67/109,030.55 = 20,095.15/x
  3. Step 3: Cross multiply
    72,685.67x = 109,030.55 × 20,095.15
  4. Step 4: Simplify right side
    72,685.67x = 2,190,984,883.78
  5. Step 5: Solve for x
    x = 2,190,984,883.78/72,685.67
  6. Step 6: Final answer
    x = 30,143.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.