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Finding the Fourth Proportional to 86,779.86, 130,021.17 and 47,364.63

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Solution

The fourth proportional to 86,779.86, 130,021.17 and 47,364.63 is: 70,965.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,779.86 : 130,021.17 = 47,364.63 : x
  2. Step 2: Convert to fraction form
    86,779.86/130,021.17 = 47,364.63/x
  3. Step 3: Cross multiply
    86,779.86x = 130,021.17 × 47,364.63
  4. Step 4: Simplify right side
    86,779.86x = 6,158,404,609.22
  5. Step 5: Solve for x
    x = 6,158,404,609.22/86,779.86
  6. Step 6: Final answer
    x = 70,965.83

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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.