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Finding the Fourth Proportional to 630,042.80, 945,071.40 and 156,729.20

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Solution

The fourth proportional to 630,042.80, 945,071.40 and 156,729.20 is: 235,095.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,042.80 : 945,071.40 = 156,729.20 : x
  2. Step 2: Convert to fraction form
    630,042.80/945,071.40 = 156,729.20/x
  3. Step 3: Cross multiply
    630,042.80x = 945,071.40 × 156,729.20
  4. Step 4: Simplify right side
    630,042.80x = 148,120,284,464.88
  5. Step 5: Solve for x
    x = 148,120,284,464.88/630,042.80
  6. Step 6: Final answer
    x = 235,095.59

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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.