Home / 90,335.03-135,354.72-54,688.30

Finding the Fourth Proportional to 90,335.03, 135,354.72 and 54,688.30

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Solution

The fourth proportional to 90,335.03, 135,354.72 and 54,688.30 is: 81,942.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,335.03 : 135,354.72 = 54,688.30 : x
  2. Step 2: Convert to fraction form
    90,335.03/135,354.72 = 54,688.30/x
  3. Step 3: Cross multiply
    90,335.03x = 135,354.72 × 54,688.30
  4. Step 4: Simplify right side
    90,335.03x = 7,402,318,990.31
  5. Step 5: Solve for x
    x = 7,402,318,990.31/90,335.03
  6. Step 6: Final answer
    x = 81,942.96

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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.