Home / 100,492.25-138,772.64-64,744.25

Finding the Fourth Proportional to 100,492.25, 138,772.64 and 64,744.25

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Solution

The fourth proportional to 100,492.25, 138,772.64 and 64,744.25 is: 89,407.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,492.25 : 138,772.64 = 64,744.25 : x
  2. Step 2: Convert to fraction form
    100,492.25/138,772.64 = 64,744.25/x
  3. Step 3: Cross multiply
    100,492.25x = 138,772.64 × 64,744.25
  4. Step 4: Simplify right side
    100,492.25x = 8,984,729,965.32
  5. Step 5: Solve for x
    x = 8,984,729,965.32/100,492.25
  6. Step 6: Final answer
    x = 89,407.20

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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.