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Finding the Fourth Proportional to 109,778.64, 164,888.40 and 65,491.80

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Solution

The fourth proportional to 109,778.64, 164,888.40 and 65,491.80 is: 98,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,778.64 : 164,888.40 = 65,491.80 : x
  2. Step 2: Convert to fraction form
    109,778.64/164,888.40 = 65,491.80/x
  3. Step 3: Cross multiply
    109,778.64x = 164,888.40 × 65,491.80
  4. Step 4: Simplify right side
    109,778.64x = 10,798,838,115.12
  5. Step 5: Solve for x
    x = 10,798,838,115.12/109,778.64
  6. Step 6: Final answer
    x = 98,369.21

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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.