Home / 103,929.40-155,894.10-90,412.60

Finding the Fourth Proportional to 103,929.40, 155,894.10 and 90,412.60

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Solution

The fourth proportional to 103,929.40, 155,894.10 and 90,412.60 is: 135,618.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,929.40 : 155,894.10 = 90,412.60 : x
  2. Step 2: Convert to fraction form
    103,929.40/155,894.10 = 90,412.60/x
  3. Step 3: Cross multiply
    103,929.40x = 155,894.10 × 90,412.60
  4. Step 4: Simplify right side
    103,929.40x = 14,094,790,905.66
  5. Step 5: Solve for x
    x = 14,094,790,905.66/103,929.40
  6. Step 6: Final answer
    x = 135,618.90

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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.