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Finding the Fourth Proportional to 131,866.72, 181,994.64 and 75,281.44

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Solution

The fourth proportional to 131,866.72, 181,994.64 and 75,281.44 is: 103,898.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,866.72 : 181,994.64 = 75,281.44 : x
  2. Step 2: Convert to fraction form
    131,866.72/181,994.64 = 75,281.44/x
  3. Step 3: Cross multiply
    131,866.72x = 181,994.64 × 75,281.44
  4. Step 4: Simplify right side
    131,866.72x = 13,700,818,571.48
  5. Step 5: Solve for x
    x = 13,700,818,571.48/131,866.72
  6. Step 6: Final answer
    x = 103,898.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.