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Finding the Fourth Proportional to 72,645.93, 100,246.77 and 42,439.80

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Solution

The fourth proportional to 72,645.93, 100,246.77 and 42,439.80 is: 58,564.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,645.93 : 100,246.77 = 42,439.80 : x
  2. Step 2: Convert to fraction form
    72,645.93/100,246.77 = 42,439.80/x
  3. Step 3: Cross multiply
    72,645.93x = 100,246.77 × 42,439.80
  4. Step 4: Simplify right side
    72,645.93x = 4,254,452,869.45
  5. Step 5: Solve for x
    x = 4,254,452,869.45/72,645.93
  6. Step 6: Final answer
    x = 58,564.23

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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.