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Finding the Fourth Proportional to 86,881.60, 130,098.84 and 60,189.67

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Solution

The fourth proportional to 86,881.60, 130,098.84 and 60,189.67 is: 90,129.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,881.60 : 130,098.84 = 60,189.67 : x
  2. Step 2: Convert to fraction form
    86,881.60/130,098.84 = 60,189.67/x
  3. Step 3: Cross multiply
    86,881.60x = 130,098.84 × 60,189.67
  4. Step 4: Simplify right side
    86,881.60x = 7,830,606,246.98
  5. Step 5: Solve for x
    x = 7,830,606,246.98/86,881.60
  6. Step 6: Final answer
    x = 90,129.63

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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.