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Finding the Fourth Proportional to 100,876.25, 139,265.12 and 60,599.81

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Solution

The fourth proportional to 100,876.25, 139,265.12 and 60,599.81 is: 83,661.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,876.25 : 139,265.12 = 60,599.81 : x
  2. Step 2: Convert to fraction form
    100,876.25/139,265.12 = 60,599.81/x
  3. Step 3: Cross multiply
    100,876.25x = 139,265.12 × 60,599.81
  4. Step 4: Simplify right side
    100,876.25x = 8,439,440,311.29
  5. Step 5: Solve for x
    x = 8,439,440,311.29/100,876.25
  6. Step 6: Final answer
    x = 83,661.32

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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.