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Finding the Fourth Proportional to 100,763.88, 139,073.40 and 66,712.29

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Solution

The fourth proportional to 100,763.88, 139,073.40 and 66,712.29 is: 92,075.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,763.88 : 139,073.40 = 66,712.29 : x
  2. Step 2: Convert to fraction form
    100,763.88/139,073.40 = 66,712.29/x
  3. Step 3: Cross multiply
    100,763.88x = 139,073.40 × 66,712.29
  4. Step 4: Simplify right side
    100,763.88x = 9,277,904,992.09
  5. Step 5: Solve for x
    x = 9,277,904,992.09/100,763.88
  6. Step 6: Final answer
    x = 92,075.70

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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.