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Finding the Fourth Proportional to 72,600.81, 100,171.59 and 42,368.87

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Solution

The fourth proportional to 72,600.81, 100,171.59 and 42,368.87 is: 58,458.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,600.81 : 100,171.59 = 42,368.87 : x
  2. Step 2: Convert to fraction form
    72,600.81/100,171.59 = 42,368.87/x
  3. Step 3: Cross multiply
    72,600.81x = 100,171.59 × 42,368.87
  4. Step 4: Simplify right side
    72,600.81x = 4,244,157,165.95
  5. Step 5: Solve for x
    x = 4,244,157,165.95/72,600.81
  6. Step 6: Final answer
    x = 58,458.82

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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.