Home / 100,637.48-138,897.82-64,872.20

Finding the Fourth Proportional to 100,637.48, 138,897.82 and 64,872.20

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Solution

The fourth proportional to 100,637.48, 138,897.82 and 64,872.20 is: 89,535.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,637.48 : 138,897.82 = 64,872.20 : x
  2. Step 2: Convert to fraction form
    100,637.48/138,897.82 = 64,872.20/x
  3. Step 3: Cross multiply
    100,637.48x = 138,897.82 × 64,872.20
  4. Step 4: Simplify right side
    100,637.48x = 9,010,607,158.60
  5. Step 5: Solve for x
    x = 9,010,607,158.60/100,637.48
  6. Step 6: Final answer
    x = 89,535.30

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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.