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Finding the Fourth Proportional to 123,528.68, 170,465.80 and 72,540.64

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Solution

The fourth proportional to 123,528.68, 170,465.80 and 72,540.64 is: 100,103.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,528.68 : 170,465.80 = 72,540.64 : x
  2. Step 2: Convert to fraction form
    123,528.68/170,465.80 = 72,540.64/x
  3. Step 3: Cross multiply
    123,528.68x = 170,465.80 × 72,540.64
  4. Step 4: Simplify right side
    123,528.68x = 12,365,698,230.11
  5. Step 5: Solve for x
    x = 12,365,698,230.11/123,528.68
  6. Step 6: Final answer
    x = 100,103.86

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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.