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Finding the Fourth Proportional to 72,322.96, 99,811.24 and 42,117.68

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Solution

The fourth proportional to 72,322.96, 99,811.24 and 42,117.68 is: 58,125.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,322.96 : 99,811.24 = 42,117.68 : x
  2. Step 2: Convert to fraction form
    72,322.96/99,811.24 = 42,117.68/x
  3. Step 3: Cross multiply
    72,322.96x = 99,811.24 × 42,117.68
  4. Step 4: Simplify right side
    72,322.96x = 4,203,817,866.72
  5. Step 5: Solve for x
    x = 4,203,817,866.72/72,322.96
  6. Step 6: Final answer
    x = 58,125.63

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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.