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Finding the Fourth Proportional to 86,710.10, 130,139.22 and 61,811.06

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Solution

The fourth proportional to 86,710.10, 130,139.22 and 61,811.06 is: 92,769.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,710.10 : 130,139.22 = 61,811.06 : x
  2. Step 2: Convert to fraction form
    86,710.10/130,139.22 = 61,811.06/x
  3. Step 3: Cross multiply
    86,710.10x = 130,139.22 × 61,811.06
  4. Step 4: Simplify right side
    86,710.10x = 8,044,043,135.77
  5. Step 5: Solve for x
    x = 8,044,043,135.77/86,710.10
  6. Step 6: Final answer
    x = 92,769.39

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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.