Home / 72,705.22-109,013.16-28,280.20

Finding the Fourth Proportional to 72,705.22, 109,013.16 and 28,280.20

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Solution

The fourth proportional to 72,705.22, 109,013.16 and 28,280.20 is: 42,402.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,705.22 : 109,013.16 = 28,280.20 : x
  2. Step 2: Convert to fraction form
    72,705.22/109,013.16 = 28,280.20/x
  3. Step 3: Cross multiply
    72,705.22x = 109,013.16 × 28,280.20
  4. Step 4: Simplify right side
    72,705.22x = 3,082,913,967.43
  5. Step 5: Solve for x
    x = 3,082,913,967.43/72,705.22
  6. Step 6: Final answer
    x = 42,402.92

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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.