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Finding the Fourth Proportional to 86,780.60, 130,022.30 and 47,365.37

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Solution

The fourth proportional to 86,780.60, 130,022.30 and 47,365.37 is: 70,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,780.60 : 130,022.30 = 47,365.37 : x
  2. Step 2: Convert to fraction form
    86,780.60/130,022.30 = 47,365.37/x
  3. Step 3: Cross multiply
    86,780.60x = 130,022.30 × 47,365.37
  4. Step 4: Simplify right side
    86,780.60x = 6,158,554,347.75
  5. Step 5: Solve for x
    x = 6,158,554,347.75/86,780.60
  6. Step 6: Final answer
    x = 70,966.95

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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.