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Finding the Fourth Proportional to 131,396.63, 181,327.55 and 74,808

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Solution

The fourth proportional to 131,396.63, 181,327.55 and 74,808 is: 103,235.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,396.63 : 181,327.55 = 74,808 : x
  2. Step 2: Convert to fraction form
    131,396.63/181,327.55 = 74,808/x
  3. Step 3: Cross multiply
    131,396.63x = 181,327.55 × 74,808
  4. Step 4: Simplify right side
    131,396.63x = 13,564,750,986.36
  5. Step 5: Solve for x
    x = 13,564,750,986.36/131,396.63
  6. Step 6: Final answer
    x = 103,235.16

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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.