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Finding the Fourth Proportional to 158,101.40, 218,118.69 and 100,730.52

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Solution

The fourth proportional to 158,101.40, 218,118.69 and 100,730.52 is: 138,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,101.40 : 218,118.69 = 100,730.52 : x
  2. Step 2: Convert to fraction form
    158,101.40/218,118.69 = 100,730.52/x
  3. Step 3: Cross multiply
    158,101.40x = 218,118.69 × 100,730.52
  4. Step 4: Simplify right side
    158,101.40x = 21,971,209,065.42
  5. Step 5: Solve for x
    x = 21,971,209,065.42/158,101.40
  6. Step 6: Final answer
    x = 138,969.10

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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.