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Finding the Fourth Proportional to 131,488.80, 197,281.80 and 42,745.20

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Solution

The fourth proportional to 131,488.80, 197,281.80 and 42,745.20 is: 64,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,488.80 : 197,281.80 = 42,745.20 : x
  2. Step 2: Convert to fraction form
    131,488.80/197,281.80 = 42,745.20/x
  3. Step 3: Cross multiply
    131,488.80x = 197,281.80 × 42,745.20
  4. Step 4: Simplify right side
    131,488.80x = 8,432,849,997.36
  5. Step 5: Solve for x
    x = 8,432,849,997.36/131,488.80
  6. Step 6: Final answer
    x = 64,133.60

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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.