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Finding the Fourth Proportional to 218,752.56, 328,101.16 and 85,726.23

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Solution

The fourth proportional to 218,752.56, 328,101.16 and 85,726.23 is: 128,578.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,752.56 : 328,101.16 = 85,726.23 : x
  2. Step 2: Convert to fraction form
    218,752.56/328,101.16 = 85,726.23/x
  3. Step 3: Cross multiply
    218,752.56x = 328,101.16 × 85,726.23
  4. Step 4: Simplify right side
    218,752.56x = 28,126,875,825.93
  5. Step 5: Solve for x
    x = 28,126,875,825.93/218,752.56
  6. Step 6: Final answer
    x = 128,578.50

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1.5x scale

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.