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Finding the Fourth Proportional to 99,668,036.80, 149,502,055.20 and 75,481,566.40

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Solution

The fourth proportional to 99,668,036.80, 149,502,055.20 and 75,481,566.40 is: 113,222,349.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,668,036.80 : 149,502,055.20 = 75,481,566.40 : x
  2. Step 2: Convert to fraction form
    99,668,036.80/149,502,055.20 = 75,481,566.40/x
  3. Step 3: Cross multiply
    99,668,036.80x = 149,502,055.20 × 75,481,566.40
  4. Step 4: Simplify right side
    99,668,036.80x = 11,284,649,306,515,266
  5. Step 5: Solve for x
    x = 11,284,649,306,515,266/99,668,036.80
  6. Step 6: Final answer
    x = 113,222,349.60

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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.