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Finding the Fourth Proportional to 86,779.60, 130,020.80 and 47,364.37

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Solution

The fourth proportional to 86,779.60, 130,020.80 and 47,364.37 is: 70,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,779.60 : 130,020.80 = 47,364.37 : x
  2. Step 2: Convert to fraction form
    86,779.60/130,020.80 = 47,364.37/x
  3. Step 3: Cross multiply
    86,779.60x = 130,020.80 × 47,364.37
  4. Step 4: Simplify right side
    86,779.60x = 6,158,353,278.90
  5. Step 5: Solve for x
    x = 6,158,353,278.90/86,779.60
  6. Step 6: Final answer
    x = 70,965.45

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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.