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Finding the Fourth Proportional to 86,885.55, 130,286.63 and 36,938.57

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Solution

The fourth proportional to 86,885.55, 130,286.63 and 36,938.57 is: 55,390.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,885.55 : 130,286.63 = 36,938.57 : x
  2. Step 2: Convert to fraction form
    86,885.55/130,286.63 = 36,938.57/x
  3. Step 3: Cross multiply
    86,885.55x = 130,286.63 × 36,938.57
  4. Step 4: Simplify right side
    86,885.55x = 4,812,600,966.19
  5. Step 5: Solve for x
    x = 4,812,600,966.19/86,885.55
  6. Step 6: Final answer
    x = 55,390.12

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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.