Home / 109,881.20-164,821.80-90,854.30

Finding the Fourth Proportional to 109,881.20, 164,821.80 and 90,854.30

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Solution

The fourth proportional to 109,881.20, 164,821.80 and 90,854.30 is: 136,281.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,881.20 : 164,821.80 = 90,854.30 : x
  2. Step 2: Convert to fraction form
    109,881.20/164,821.80 = 90,854.30/x
  3. Step 3: Cross multiply
    109,881.20x = 164,821.80 × 90,854.30
  4. Step 4: Simplify right side
    109,881.20x = 14,974,769,263.74
  5. Step 5: Solve for x
    x = 14,974,769,263.74/109,881.20
  6. Step 6: Final answer
    x = 136,281.45

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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.