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Finding the Fourth Proportional to 103,548.38, 155,124.68 and 86,788.67

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Solution

The fourth proportional to 103,548.38, 155,124.68 and 86,788.67 is: 130,017.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,548.38 : 155,124.68 = 86,788.67 : x
  2. Step 2: Convert to fraction form
    103,548.38/155,124.68 = 86,788.67/x
  3. Step 3: Cross multiply
    103,548.38x = 155,124.68 × 86,788.67
  4. Step 4: Simplify right side
    103,548.38x = 13,463,063,451.81
  5. Step 5: Solve for x
    x = 13,463,063,451.81/103,548.38
  6. Step 6: Final answer
    x = 130,017.14

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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.