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Finding the Fourth Proportional to 112,998.80, 169,498.20 and 68,712.40

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Solution

The fourth proportional to 112,998.80, 169,498.20 and 68,712.40 is: 103,068.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,998.80 : 169,498.20 = 68,712.40 : x
  2. Step 2: Convert to fraction form
    112,998.80/169,498.20 = 68,712.40/x
  3. Step 3: Cross multiply
    112,998.80x = 169,498.20 × 68,712.40
  4. Step 4: Simplify right side
    112,998.80x = 11,646,628,117.68
  5. Step 5: Solve for x
    x = 11,646,628,117.68/112,998.80
  6. Step 6: Final answer
    x = 103,068.60

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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.