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Finding the Fourth Proportional to 84,877.79, 117,087.42 and 57,655.28

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Solution

The fourth proportional to 84,877.79, 117,087.42 and 57,655.28 is: 79,534.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,877.79 : 117,087.42 = 57,655.28 : x
  2. Step 2: Convert to fraction form
    84,877.79/117,087.42 = 57,655.28/x
  3. Step 3: Cross multiply
    84,877.79x = 117,087.42 × 57,655.28
  4. Step 4: Simplify right side
    84,877.79x = 6,750,707,984.58
  5. Step 5: Solve for x
    x = 6,750,707,984.58/84,877.79
  6. Step 6: Final answer
    x = 79,534.45

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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.