Home / 103,430.30-155,145.45-98,618.90

Finding the Fourth Proportional to 103,430.30, 155,145.45 and 98,618.90

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Solution

The fourth proportional to 103,430.30, 155,145.45 and 98,618.90 is: 147,928.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.30 : 155,145.45 = 98,618.90 : x
  2. Step 2: Convert to fraction form
    103,430.30/155,145.45 = 98,618.90/x
  3. Step 3: Cross multiply
    103,430.30x = 155,145.45 × 98,618.90
  4. Step 4: Simplify right side
    103,430.30x = 15,300,273,619.01
  5. Step 5: Solve for x
    x = 15,300,273,619.01/103,430.30
  6. Step 6: Final answer
    x = 147,928.35

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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.