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Finding the Fourth Proportional to 72,644.80, 100,242.48 and 42,430.72

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Solution

The fourth proportional to 72,644.80, 100,242.48 and 42,430.72 is: 58,550.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,644.80 : 100,242.48 = 42,430.72 : x
  2. Step 2: Convert to fraction form
    72,644.80/100,242.48 = 42,430.72/x
  3. Step 3: Cross multiply
    72,644.80x = 100,242.48 × 42,430.72
  4. Step 4: Simplify right side
    72,644.80x = 4,253,360,600.99
  5. Step 5: Solve for x
    x = 4,253,360,600.99/72,644.80
  6. Step 6: Final answer
    x = 58,550.10

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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.