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Finding the Fourth Proportional to 266,112,043.20, 399,168,064.80 and 84,358,929.60

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Solution

The fourth proportional to 266,112,043.20, 399,168,064.80 and 84,358,929.60 is: 126,538,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,112,043.20 : 399,168,064.80 = 84,358,929.60 : x
  2. Step 2: Convert to fraction form
    266,112,043.20/399,168,064.80 = 84,358,929.60/x
  3. Step 3: Cross multiply
    266,112,043.20x = 399,168,064.80 × 84,358,929.60
  4. Step 4: Simplify right side
    266,112,043.20x = 33,673,390,677,031,436
  5. Step 5: Solve for x
    x = 33,673,390,677,031,436/266,112,043.20
  6. Step 6: Final answer
    x = 126,538,394.40

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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.