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Finding the Fourth Proportional to 103,590.90, 155,167.65 and 86,094.90

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Solution

The fourth proportional to 103,590.90, 155,167.65 and 86,094.90 is: 128,960.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,590.90 : 155,167.65 = 86,094.90 : x
  2. Step 2: Convert to fraction form
    103,590.90/155,167.65 = 86,094.90/x
  3. Step 3: Cross multiply
    103,590.90x = 155,167.65 × 86,094.90
  4. Step 4: Simplify right side
    103,590.90x = 13,359,143,309.99
  5. Step 5: Solve for x
    x = 13,359,143,309.99/103,590.90
  6. Step 6: Final answer
    x = 128,960.59

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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.