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Finding the Fourth Proportional to 130,610.88, 180,262.72 and 79,653.18

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Solution

The fourth proportional to 130,610.88, 180,262.72 and 79,653.18 is: 109,933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,610.88 : 180,262.72 = 79,653.18 : x
  2. Step 2: Convert to fraction form
    130,610.88/180,262.72 = 79,653.18/x
  3. Step 3: Cross multiply
    130,610.88x = 180,262.72 × 79,653.18
  4. Step 4: Simplify right side
    130,610.88x = 14,358,498,615.55
  5. Step 5: Solve for x
    x = 14,358,498,615.55/130,610.88
  6. Step 6: Final answer
    x = 109,933.40

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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.