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Finding the Fourth Proportional to 78,634.79, 117,835.55 and 57,756.23

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Solution

The fourth proportional to 78,634.79, 117,835.55 and 57,756.23 is: 86,548.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,634.79 : 117,835.55 = 57,756.23 : x
  2. Step 2: Convert to fraction form
    78,634.79/117,835.55 = 57,756.23/x
  3. Step 3: Cross multiply
    78,634.79x = 117,835.55 × 57,756.23
  4. Step 4: Simplify right side
    78,634.79x = 6,805,737,133.78
  5. Step 5: Solve for x
    x = 6,805,737,133.78/78,634.79
  6. Step 6: Final answer
    x = 86,548.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.