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Finding the Fourth Proportional to 72,972.60, 109,458.90 and 26,230.20

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Solution

The fourth proportional to 72,972.60, 109,458.90 and 26,230.20 is: 39,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,972.60 : 109,458.90 = 26,230.20 : x
  2. Step 2: Convert to fraction form
    72,972.60/109,458.90 = 26,230.20/x
  3. Step 3: Cross multiply
    72,972.60x = 109,458.90 × 26,230.20
  4. Step 4: Simplify right side
    72,972.60x = 2,871,128,838.78
  5. Step 5: Solve for x
    x = 2,871,128,838.78/72,972.60
  6. Step 6: Final answer
    x = 39,345.30

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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.