Home / 90,612.72-135,888.24-34,439.28

Finding the Fourth Proportional to 90,612.72, 135,888.24 and 34,439.28

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Solution

The fourth proportional to 90,612.72, 135,888.24 and 34,439.28 is: 51,647.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,612.72 : 135,888.24 = 34,439.28 : x
  2. Step 2: Convert to fraction form
    90,612.72/135,888.24 = 34,439.28/x
  3. Step 3: Cross multiply
    90,612.72x = 135,888.24 × 34,439.28
  4. Step 4: Simplify right side
    90,612.72x = 4,679,893,146.07
  5. Step 5: Solve for x
    x = 4,679,893,146.07/90,612.72
  6. Step 6: Final answer
    x = 51,647.20

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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.