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Finding the Fourth Proportional to 103,430.55, 155,145.83 and 98,619.15

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Solution

The fourth proportional to 103,430.55, 155,145.83 and 98,619.15 is: 147,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.55 : 155,145.83 = 98,619.15 : x
  2. Step 2: Convert to fraction form
    103,430.55/155,145.83 = 98,619.15/x
  3. Step 3: Cross multiply
    103,430.55x = 155,145.83 × 98,619.15
  4. Step 4: Simplify right side
    103,430.55x = 15,300,349,387.55
  5. Step 5: Solve for x
    x = 15,300,349,387.55/103,430.55
  6. Step 6: Final answer
    x = 147,928.73

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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.