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Finding the Fourth Proportional to 72,480.48, 100,023.76 and 40,648.69

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Solution

The fourth proportional to 72,480.48, 100,023.76 and 40,648.69 is: 56,095.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,480.48 : 100,023.76 = 40,648.69 : x
  2. Step 2: Convert to fraction form
    72,480.48/100,023.76 = 40,648.69/x
  3. Step 3: Cross multiply
    72,480.48x = 100,023.76 × 40,648.69
  4. Step 4: Simplify right side
    72,480.48x = 4,065,834,812.87
  5. Step 5: Solve for x
    x = 4,065,834,812.87/72,480.48
  6. Step 6: Final answer
    x = 56,095.58

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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.