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Finding the Fourth Proportional to 72,471.40, 99,986.62 and 43,780.32

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Solution

The fourth proportional to 72,471.40, 99,986.62 and 43,780.32 is: 60,402.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,471.40 : 99,986.62 = 43,780.32 : x
  2. Step 2: Convert to fraction form
    72,471.40/99,986.62 = 43,780.32/x
  3. Step 3: Cross multiply
    72,471.40x = 99,986.62 × 43,780.32
  4. Step 4: Simplify right side
    72,471.40x = 4,377,446,219.32
  5. Step 5: Solve for x
    x = 4,377,446,219.32/72,471.40
  6. Step 6: Final answer
    x = 60,402.40

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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.