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Finding the Fourth Proportional to 100,611.34, 138,813.36 and 60,310.40

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Solution

The fourth proportional to 100,611.34, 138,813.36 and 60,310.40 is: 83,210.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,611.34 : 138,813.36 = 60,310.40 : x
  2. Step 2: Convert to fraction form
    100,611.34/138,813.36 = 60,310.40/x
  3. Step 3: Cross multiply
    100,611.34x = 138,813.36 × 60,310.40
  4. Step 4: Simplify right side
    100,611.34x = 8,371,888,572.88
  5. Step 5: Solve for x
    x = 8,371,888,572.88/100,611.34
  6. Step 6: Final answer
    x = 83,210.19

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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.