Home / 100,088.96-138,154.90-66,127.58

Finding the Fourth Proportional to 100,088.96, 138,154.90 and 66,127.58

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Solution

The fourth proportional to 100,088.96, 138,154.90 and 66,127.58 is: 91,277.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,088.96 : 138,154.90 = 66,127.58 : x
  2. Step 2: Convert to fraction form
    100,088.96/138,154.90 = 66,127.58/x
  3. Step 3: Cross multiply
    100,088.96x = 138,154.90 × 66,127.58
  4. Step 4: Simplify right side
    100,088.96x = 9,135,849,202.14
  5. Step 5: Solve for x
    x = 9,135,849,202.14/100,088.96
  6. Step 6: Final answer
    x = 91,277.29

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1.5x scale

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.