Home / 103,347.20-155,020.80-98,426.45

Finding the Fourth Proportional to 103,347.20, 155,020.80 and 98,426.45

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Solution

The fourth proportional to 103,347.20, 155,020.80 and 98,426.45 is: 147,639.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,347.20 : 155,020.80 = 98,426.45 : x
  2. Step 2: Convert to fraction form
    103,347.20/155,020.80 = 98,426.45/x
  3. Step 3: Cross multiply
    103,347.20x = 155,020.80 × 98,426.45
  4. Step 4: Simplify right side
    103,347.20x = 15,258,147,020.16
  5. Step 5: Solve for x
    x = 15,258,147,020.16/103,347.20
  6. Step 6: Final answer
    x = 147,639.68

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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.