Home / 98,145.40-135,430.48-55,129.72

Finding the Fourth Proportional to 98,145.40, 135,430.48 and 55,129.72

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Solution

The fourth proportional to 98,145.40, 135,430.48 and 55,129.72 is: 76,073.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,145.40 : 135,430.48 = 55,129.72 : x
  2. Step 2: Convert to fraction form
    98,145.40/135,430.48 = 55,129.72/x
  3. Step 3: Cross multiply
    98,145.40x = 135,430.48 × 55,129.72
  4. Step 4: Simplify right side
    98,145.40x = 7,466,244,441.87
  5. Step 5: Solve for x
    x = 7,466,244,441.87/98,145.40
  6. Step 6: Final answer
    x = 76,073.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.