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Finding the Fourth Proportional to 163,658.75, 245,477.92 and 78,330.21

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Solution

The fourth proportional to 163,658.75, 245,477.92 and 78,330.21 is: 117,490.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,658.75 : 245,477.92 = 78,330.21 : x
  2. Step 2: Convert to fraction form
    163,658.75/245,477.92 = 78,330.21/x
  3. Step 3: Cross multiply
    163,658.75x = 245,477.92 × 78,330.21
  4. Step 4: Simplify right side
    163,658.75x = 19,228,335,796.57
  5. Step 5: Solve for x
    x = 19,228,335,796.57/163,658.75
  6. Step 6: Final answer
    x = 117,490.43

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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.