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Finding the Fourth Proportional to 129,745.84, 179,049.18 and 70,129.84

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Solution

The fourth proportional to 129,745.84, 179,049.18 and 70,129.84 is: 96,779.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,745.84 : 179,049.18 = 70,129.84 : x
  2. Step 2: Convert to fraction form
    129,745.84/179,049.18 = 70,129.84/x
  3. Step 3: Cross multiply
    129,745.84x = 179,049.18 × 70,129.84
  4. Step 4: Simplify right side
    129,745.84x = 12,556,690,345.53
  5. Step 5: Solve for x
    x = 12,556,690,345.53/129,745.84
  6. Step 6: Final answer
    x = 96,779.14

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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.