Home / 86,378.78-129,402.93-76,269.98

Finding the Fourth Proportional to 86,378.78, 129,402.93 and 76,269.98

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Solution

The fourth proportional to 86,378.78, 129,402.93 and 76,269.98 is: 114,259.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.78 : 129,402.93 = 76,269.98 : x
  2. Step 2: Convert to fraction form
    86,378.78/129,402.93 = 76,269.98/x
  3. Step 3: Cross multiply
    86,378.78x = 129,402.93 × 76,269.98
  4. Step 4: Simplify right side
    86,378.78x = 9,869,558,883.04
  5. Step 5: Solve for x
    x = 9,869,558,883.04/86,378.78
  6. Step 6: Final answer
    x = 114,259.07

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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.