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Finding the Fourth Proportional to 109,800.40, 164,854.20 and 68,328.40

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Solution

The fourth proportional to 109,800.40, 164,854.20 and 68,328.40 is: 102,588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,800.40 : 164,854.20 = 68,328.40 : x
  2. Step 2: Convert to fraction form
    109,800.40/164,854.20 = 68,328.40/x
  3. Step 3: Cross multiply
    109,800.40x = 164,854.20 × 68,328.40
  4. Step 4: Simplify right side
    109,800.40x = 11,264,223,719.28
  5. Step 5: Solve for x
    x = 11,264,223,719.28/109,800.40
  6. Step 6: Final answer
    x = 102,588.18

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1.5x scale

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.