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Finding the Fourth Proportional to 112,803.40, 169,064.70 and 72,716.68

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Solution

The fourth proportional to 112,803.40, 169,064.70 and 72,716.68 is: 108,984.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,803.40 : 169,064.70 = 72,716.68 : x
  2. Step 2: Convert to fraction form
    112,803.40/169,064.70 = 72,716.68/x
  3. Step 3: Cross multiply
    112,803.40x = 169,064.70 × 72,716.68
  4. Step 4: Simplify right side
    112,803.40x = 12,293,823,689.20
  5. Step 5: Solve for x
    x = 12,293,823,689.20/112,803.40
  6. Step 6: Final answer
    x = 108,984.51

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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.