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Finding the Fourth Proportional to 109,656.64, 151,328.88 and 61,910.68

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Solution

The fourth proportional to 109,656.64, 151,328.88 and 61,910.68 is: 85,438.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,656.64 : 151,328.88 = 61,910.68 : x
  2. Step 2: Convert to fraction form
    109,656.64/151,328.88 = 61,910.68/x
  3. Step 3: Cross multiply
    109,656.64x = 151,328.88 × 61,910.68
  4. Step 4: Simplify right side
    109,656.64x = 9,368,873,864.44
  5. Step 5: Solve for x
    x = 9,368,873,864.44/109,656.64
  6. Step 6: Final answer
    x = 85,438.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.