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Finding the Fourth Proportional to 120,133.68, 180,480.75 and 70,248.83

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Solution

The fourth proportional to 120,133.68, 180,480.75 and 70,248.83 is: 105,537.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,133.68 : 180,480.75 = 70,248.83 : x
  2. Step 2: Convert to fraction form
    120,133.68/180,480.75 = 70,248.83/x
  3. Step 3: Cross multiply
    120,133.68x = 180,480.75 × 70,248.83
  4. Step 4: Simplify right side
    120,133.68x = 12,678,561,973.95
  5. Step 5: Solve for x
    x = 12,678,561,973.95/120,133.68
  6. Step 6: Final answer
    x = 105,537.12

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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.