Home / 153,892.20-212,382.90-90,265.08

Finding the Fourth Proportional to 153,892.20, 212,382.90 and 90,265.08

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Solution

The fourth proportional to 153,892.20, 212,382.90 and 90,265.08 is: 124,572.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,892.20 : 212,382.90 = 90,265.08 : x
  2. Step 2: Convert to fraction form
    153,892.20/212,382.90 = 90,265.08/x
  3. Step 3: Cross multiply
    153,892.20x = 212,382.90 × 90,265.08
  4. Step 4: Simplify right side
    153,892.20x = 19,170,759,459.13
  5. Step 5: Solve for x
    x = 19,170,759,459.13/153,892.20
  6. Step 6: Final answer
    x = 124,572.65

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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.