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Finding the Fourth Proportional to 123,468.48, 170,386.20 and 66,880.80

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Solution

The fourth proportional to 123,468.48, 170,386.20 and 66,880.80 is: 92,295.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,468.48 : 170,386.20 = 66,880.80 : x
  2. Step 2: Convert to fraction form
    123,468.48/170,386.20 = 66,880.80/x
  3. Step 3: Cross multiply
    123,468.48x = 170,386.20 × 66,880.80
  4. Step 4: Simplify right side
    123,468.48x = 11,395,565,364.96
  5. Step 5: Solve for x
    x = 11,395,565,364.96/123,468.48
  6. Step 6: Final answer
    x = 92,295.34

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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.