Home / 103,975.20-155,210.67-91,363.90

Finding the Fourth Proportional to 103,975.20, 155,210.67 and 91,363.90

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Solution

The fourth proportional to 103,975.20, 155,210.67 and 91,363.90 is: 136,384.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,975.20 : 155,210.67 = 91,363.90 : x
  2. Step 2: Convert to fraction form
    103,975.20/155,210.67 = 91,363.90/x
  3. Step 3: Cross multiply
    103,975.20x = 155,210.67 × 91,363.90
  4. Step 4: Simplify right side
    103,975.20x = 14,180,652,132.81
  5. Step 5: Solve for x
    x = 14,180,652,132.81/103,975.20
  6. Step 6: Final answer
    x = 136,384.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.