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Finding the Fourth Proportional to 86,779.74, 130,169.61 and 45,307.74

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Solution

The fourth proportional to 86,779.74, 130,169.61 and 45,307.74 is: 67,961.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,779.74 : 130,169.61 = 45,307.74 : x
  2. Step 2: Convert to fraction form
    86,779.74/130,169.61 = 45,307.74/x
  3. Step 3: Cross multiply
    86,779.74x = 130,169.61 × 45,307.74
  4. Step 4: Simplify right side
    86,779.74x = 5,897,690,845.78
  5. Step 5: Solve for x
    x = 5,897,690,845.78/86,779.74
  6. Step 6: Final answer
    x = 67,961.61

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1.5x scale

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.