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Finding the Fourth Proportional to 153,315, 211,542.84 and 89,640.48

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Solution

The fourth proportional to 153,315, 211,542.84 and 89,640.48 is: 123,685.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,315 : 211,542.84 = 89,640.48 : x
  2. Step 2: Convert to fraction form
    153,315/211,542.84 = 89,640.48/x
  3. Step 3: Cross multiply
    153,315x = 211,542.84 × 89,640.48
  4. Step 4: Simplify right side
    153,315x = 18,962,801,718.16
  5. Step 5: Solve for x
    x = 18,962,801,718.16/153,315
  6. Step 6: Final answer
    x = 123,685.23

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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.