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Finding the Fourth Proportional to 153,892.04, 212,371.90 and 90,230.90

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Solution

The fourth proportional to 153,892.04, 212,371.90 and 90,230.90 is: 124,519.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,892.04 : 212,371.90 = 90,230.90 : x
  2. Step 2: Convert to fraction form
    153,892.04/212,371.90 = 90,230.90/x
  3. Step 3: Cross multiply
    153,892.04x = 212,371.90 × 90,230.90
  4. Step 4: Simplify right side
    153,892.04x = 19,162,507,671.71
  5. Step 5: Solve for x
    x = 19,162,507,671.71/153,892.04
  6. Step 6: Final answer
    x = 124,519.16

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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.