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Finding the Fourth Proportional to 153,251,368.78, 229,948,797.72 and 66,978,565.45

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Solution

The fourth proportional to 153,251,368.78, 229,948,797.72 and 66,978,565.45 is: 100,499,204.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,251,368.78 : 229,948,797.72 = 66,978,565.45 : x
  2. Step 2: Convert to fraction form
    153,251,368.78/229,948,797.72 = 66,978,565.45/x
  3. Step 3: Cross multiply
    153,251,368.78x = 229,948,797.72 × 66,978,565.45
  4. Step 4: Simplify right side
    153,251,368.78x = 15,401,640,598,237,832
  5. Step 5: Solve for x
    x = 15,401,640,598,237,832/153,251,368.78
  6. Step 6: Final answer
    x = 100,499,204.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.