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Finding the Fourth Proportional to 100,562.32, 138,772.20 and 55,853.20

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Solution

The fourth proportional to 100,562.32, 138,772.20 and 55,853.20 is: 77,075.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,562.32 : 138,772.20 = 55,853.20 : x
  2. Step 2: Convert to fraction form
    100,562.32/138,772.20 = 55,853.20/x
  3. Step 3: Cross multiply
    100,562.32x = 138,772.20 × 55,853.20
  4. Step 4: Simplify right side
    100,562.32x = 7,750,871,441.04
  5. Step 5: Solve for x
    x = 7,750,871,441.04/100,562.32
  6. Step 6: Final answer
    x = 77,075.30

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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.