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Finding the Fourth Proportional to 103,689.59, 143,039.39 and 60,640.92

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Solution

The fourth proportional to 103,689.59, 143,039.39 and 60,640.92 is: 83,653.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.59 : 143,039.39 = 60,640.92 : x
  2. Step 2: Convert to fraction form
    103,689.59/143,039.39 = 60,640.92/x
  3. Step 3: Cross multiply
    103,689.59x = 143,039.39 × 60,640.92
  4. Step 4: Simplify right side
    103,689.59x = 8,674,039,902.63
  5. Step 5: Solve for x
    x = 8,674,039,902.63/103,689.59
  6. Step 6: Final answer
    x = 83,653.92

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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.