Home / 72,428.90-108,685.76-30,305.45

Finding the Fourth Proportional to 72,428.90, 108,685.76 and 30,305.45

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Solution

The fourth proportional to 72,428.90, 108,685.76 and 30,305.45 is: 45,475.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,428.90 : 108,685.76 = 30,305.45 : x
  2. Step 2: Convert to fraction form
    72,428.90/108,685.76 = 30,305.45/x
  3. Step 3: Cross multiply
    72,428.90x = 108,685.76 × 30,305.45
  4. Step 4: Simplify right side
    72,428.90x = 3,293,770,985.58
  5. Step 5: Solve for x
    x = 3,293,770,985.58/72,428.90
  6. Step 6: Final answer
    x = 45,475.92

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1.5x scale

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.