Home / 99,912.72-149,140.20-87,301.26

Finding the Fourth Proportional to 99,912.72, 149,140.20 and 87,301.26

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Solution

The fourth proportional to 99,912.72, 149,140.20 and 87,301.26 is: 130,315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,912.72 : 149,140.20 = 87,301.26 : x
  2. Step 2: Convert to fraction form
    99,912.72/149,140.20 = 87,301.26/x
  3. Step 3: Cross multiply
    99,912.72x = 149,140.20 × 87,301.26
  4. Step 4: Simplify right side
    99,912.72x = 13,020,127,376.65
  5. Step 5: Solve for x
    x = 13,020,127,376.65/99,912.72
  6. Step 6: Final answer
    x = 130,315.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.