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Finding the Fourth Proportional to 272,603.41, 408,921.51 and 85,614.91

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Solution

The fourth proportional to 272,603.41, 408,921.51 and 85,614.91 is: 128,427.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,603.41 : 408,921.51 = 85,614.91 : x
  2. Step 2: Convert to fraction form
    272,603.41/408,921.51 = 85,614.91/x
  3. Step 3: Cross multiply
    272,603.41x = 408,921.51 × 85,614.91
  4. Step 4: Simplify right side
    272,603.41x = 35,009,777,574.47
  5. Step 5: Solve for x
    x = 35,009,777,574.47/272,603.41
  6. Step 6: Final answer
    x = 128,427.51

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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.