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Finding the Fourth Proportional to 100,681.59, 138,941.12 and 55,362.51

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Solution

The fourth proportional to 100,681.59, 138,941.12 and 55,362.51 is: 76,400.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,681.59 : 138,941.12 = 55,362.51 : x
  2. Step 2: Convert to fraction form
    100,681.59/138,941.12 = 55,362.51/x
  3. Step 3: Cross multiply
    100,681.59x = 138,941.12 × 55,362.51
  4. Step 4: Simplify right side
    100,681.59x = 7,692,129,804.85
  5. Step 5: Solve for x
    x = 7,692,129,804.85/100,681.59
  6. Step 6: Final answer
    x = 76,400.56

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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.