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Finding the Fourth Proportional to 210,655.80, 290,708.46 and 125,780.28

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Solution

The fourth proportional to 210,655.80, 290,708.46 and 125,780.28 is: 173,578.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,655.80 : 290,708.46 = 125,780.28 : x
  2. Step 2: Convert to fraction form
    210,655.80/290,708.46 = 125,780.28/x
  3. Step 3: Cross multiply
    210,655.80x = 290,708.46 × 125,780.28
  4. Step 4: Simplify right side
    210,655.80x = 36,565,391,497.17
  5. Step 5: Solve for x
    x = 36,565,391,497.17/210,655.80
  6. Step 6: Final answer
    x = 173,578.85

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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.