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Finding the Fourth Proportional to 72,487.56, 100,038.87 and 40,225.22

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Solution

The fourth proportional to 72,487.56, 100,038.87 and 40,225.22 is: 55,514.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,487.56 : 100,038.87 = 40,225.22 : x
  2. Step 2: Convert to fraction form
    72,487.56/100,038.87 = 40,225.22/x
  3. Step 3: Cross multiply
    72,487.56x = 100,038.87 × 40,225.22
  4. Step 4: Simplify right side
    72,487.56x = 4,024,085,054.11
  5. Step 5: Solve for x
    x = 4,024,085,054.11/72,487.56
  6. Step 6: Final answer
    x = 55,514.15

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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.