Home / 112,720.95-169,006.40-67,640.81

Finding the Fourth Proportional to 112,720.95, 169,006.40 and 67,640.81

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Solution

The fourth proportional to 112,720.95, 169,006.40 and 67,640.81 is: 101,416.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,720.95 : 169,006.40 = 67,640.81 : x
  2. Step 2: Convert to fraction form
    112,720.95/169,006.40 = 67,640.81/x
  3. Step 3: Cross multiply
    112,720.95x = 169,006.40 × 67,640.81
  4. Step 4: Simplify right side
    112,720.95x = 11,431,728,607.95
  5. Step 5: Solve for x
    x = 11,431,728,607.95/112,720.95
  6. Step 6: Final answer
    x = 101,416.18

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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.