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Finding the Fourth Proportional to 78,658.51, 108,550.43 and 42,848.45

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Solution

The fourth proportional to 78,658.51, 108,550.43 and 42,848.45 is: 59,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,658.51 : 108,550.43 = 42,848.45 : x
  2. Step 2: Convert to fraction form
    78,658.51/108,550.43 = 42,848.45/x
  3. Step 3: Cross multiply
    78,658.51x = 108,550.43 × 42,848.45
  4. Step 4: Simplify right side
    78,658.51x = 4,651,217,672.33
  5. Step 5: Solve for x
    x = 4,651,217,672.33/78,658.51
  6. Step 6: Final answer
    x = 59,131.78

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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.