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Finding the Fourth Proportional to 72,781.34, 100,391.40 and 46,928.57

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Solution

The fourth proportional to 72,781.34, 100,391.40 and 46,928.57 is: 64,731.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,781.34 : 100,391.40 = 46,928.57 : x
  2. Step 2: Convert to fraction form
    72,781.34/100,391.40 = 46,928.57/x
  3. Step 3: Cross multiply
    72,781.34x = 100,391.40 × 46,928.57
  4. Step 4: Simplify right side
    72,781.34x = 4,711,224,340.34
  5. Step 5: Solve for x
    x = 4,711,224,340.34/72,781.34
  6. Step 6: Final answer
    x = 64,731.22

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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.