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Finding the Fourth Proportional to 66,879,796.80, 100,319,695.20 and 56,676,129.60

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Solution

The fourth proportional to 66,879,796.80, 100,319,695.20 and 56,676,129.60 is: 85,014,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,879,796.80 : 100,319,695.20 = 56,676,129.60 : x
  2. Step 2: Convert to fraction form
    66,879,796.80/100,319,695.20 = 56,676,129.60/x
  3. Step 3: Cross multiply
    66,879,796.80x = 100,319,695.20 × 56,676,129.60
  4. Step 4: Simplify right side
    66,879,796.80x = 5,685,732,046,587,698
  5. Step 5: Solve for x
    x = 5,685,732,046,587,698/66,879,796.80
  6. Step 6: Final answer
    x = 85,014,194.40

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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.