Home / 130,985.50-180,760-71,369.50

Finding the Fourth Proportional to 130,985.50, 180,760 and 71,369.50

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Solution

The fourth proportional to 130,985.50, 180,760 and 71,369.50 is: 98,489.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,985.50 : 180,760 = 71,369.50 : x
  2. Step 2: Convert to fraction form
    130,985.50/180,760 = 71,369.50/x
  3. Step 3: Cross multiply
    130,985.50x = 180,760 × 71,369.50
  4. Step 4: Simplify right side
    130,985.50x = 12,900,750,820
  5. Step 5: Solve for x
    x = 12,900,750,820/130,985.50
  6. Step 6: Final answer
    x = 98,489.92

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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.