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Finding the Fourth Proportional to 72,150.68, 99,566.10 and 40,319.84

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Solution

The fourth proportional to 72,150.68, 99,566.10 and 40,319.84 is: 55,640.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,150.68 : 99,566.10 = 40,319.84 : x
  2. Step 2: Convert to fraction form
    72,150.68/99,566.10 = 40,319.84/x
  3. Step 3: Cross multiply
    72,150.68x = 99,566.10 × 40,319.84
  4. Step 4: Simplify right side
    72,150.68x = 4,014,489,221.42
  5. Step 5: Solve for x
    x = 4,014,489,221.42/72,150.68
  6. Step 6: Final answer
    x = 55,640.35

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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.