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Finding the Fourth Proportional to 81,365.51, 112,278.76 and 54,503.69

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Solution

The fourth proportional to 81,365.51, 112,278.76 and 54,503.69 is: 75,211.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,365.51 : 112,278.76 = 54,503.69 : x
  2. Step 2: Convert to fraction form
    81,365.51/112,278.76 = 54,503.69/x
  3. Step 3: Cross multiply
    81,365.51x = 112,278.76 × 54,503.69
  4. Step 4: Simplify right side
    81,365.51x = 6,119,606,030.97
  5. Step 5: Solve for x
    x = 6,119,606,030.97/81,365.51
  6. Step 6: Final answer
    x = 75,211.30

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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.