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Finding the Fourth Proportional to 134,424, 185,505.12 and 74,808

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Solution

The fourth proportional to 134,424, 185,505.12 and 74,808 is: 103,235.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,424 : 185,505.12 = 74,808 : x
  2. Step 2: Convert to fraction form
    134,424/185,505.12 = 74,808/x
  3. Step 3: Cross multiply
    134,424x = 185,505.12 × 74,808
  4. Step 4: Simplify right side
    134,424x = 13,877,267,016.96
  5. Step 5: Solve for x
    x = 13,877,267,016.96/134,424
  6. Step 6: Final answer
    x = 103,235.04

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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.