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Finding the Fourth Proportional to 100,755.09, 139,061.88 and 57,763.44

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Solution

The fourth proportional to 100,755.09, 139,061.88 and 57,763.44 is: 79,724.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,755.09 : 139,061.88 = 57,763.44 : x
  2. Step 2: Convert to fraction form
    100,755.09/139,061.88 = 57,763.44/x
  3. Step 3: Cross multiply
    100,755.09x = 139,061.88 × 57,763.44
  4. Step 4: Simplify right side
    100,755.09x = 8,032,692,561.67
  5. Step 5: Solve for x
    x = 8,032,692,561.67/100,755.09
  6. Step 6: Final answer
    x = 79,724.93

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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.