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Finding the Fourth Proportional to 72,475.68, 100,017.27 and 40,210.90

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Solution

The fourth proportional to 72,475.68, 100,017.27 and 40,210.90 is: 55,491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,475.68 : 100,017.27 = 40,210.90 : x
  2. Step 2: Convert to fraction form
    72,475.68/100,017.27 = 40,210.90/x
  3. Step 3: Cross multiply
    72,475.68x = 100,017.27 × 40,210.90
  4. Step 4: Simplify right side
    72,475.68x = 4,021,784,192.20
  5. Step 5: Solve for x
    x = 4,021,784,192.20/72,475.68
  6. Step 6: Final answer
    x = 55,491.50

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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.