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Finding the Fourth Proportional to 100,569.98, 138,771.16 and 58,120.32

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Solution

The fourth proportional to 100,569.98, 138,771.16 and 58,120.32 is: 80,197.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,569.98 : 138,771.16 = 58,120.32 : x
  2. Step 2: Convert to fraction form
    100,569.98/138,771.16 = 58,120.32/x
  3. Step 3: Cross multiply
    100,569.98x = 138,771.16 × 58,120.32
  4. Step 4: Simplify right side
    100,569.98x = 8,065,424,225.97
  5. Step 5: Solve for x
    x = 8,065,424,225.97/100,569.98
  6. Step 6: Final answer
    x = 80,197.13

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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.