Home / 72,073,319.96-108,128,408.16-20,955,338.78

Finding the Fourth Proportional to 72,073,319.96, 108,128,408.16 and 20,955,338.78

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Solution

The fourth proportional to 72,073,319.96, 108,128,408.16 and 20,955,338.78 is: 31,438,366.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,073,319.96 : 108,128,408.16 = 20,955,338.78 : x
  2. Step 2: Convert to fraction form
    72,073,319.96/108,128,408.16 = 20,955,338.78/x
  3. Step 3: Cross multiply
    72,073,319.96x = 108,128,408.16 × 20,955,338.78
  4. Step 4: Simplify right side
    72,073,319.96x = 2,265,867,424,734,916.50
  5. Step 5: Solve for x
    x = 2,265,867,424,734,916.50/72,073,319.96
  6. Step 6: Final answer
    x = 31,438,366.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.