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Finding the Fourth Proportional to 100,963.58, 139,330.69 and 55,643.22

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Solution

The fourth proportional to 100,963.58, 139,330.69 and 55,643.22 is: 76,788.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,963.58 : 139,330.69 = 55,643.22 : x
  2. Step 2: Convert to fraction form
    100,963.58/139,330.69 = 55,643.22/x
  3. Step 3: Cross multiply
    100,963.58x = 139,330.69 × 55,643.22
  4. Step 4: Simplify right side
    100,963.58x = 7,752,808,236.42
  5. Step 5: Solve for x
    x = 7,752,808,236.42/100,963.58
  6. Step 6: Final answer
    x = 76,788.17

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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.