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Finding the Fourth Proportional to 123,341.74, 170,210.32 and 72,344.70

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Solution

The fourth proportional to 123,341.74, 170,210.32 and 72,344.70 is: 99,834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,341.74 : 170,210.32 = 72,344.70 : x
  2. Step 2: Convert to fraction form
    123,341.74/170,210.32 = 72,344.70/x
  3. Step 3: Cross multiply
    123,341.74x = 170,210.32 × 72,344.70
  4. Step 4: Simplify right side
    123,341.74x = 12,313,814,356.44
  5. Step 5: Solve for x
    x = 12,313,814,356.44/123,341.74
  6. Step 6: Final answer
    x = 99,834.94

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1.5x scale

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.