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Finding the Fourth Proportional to 123,794.47, 170,837.08 and 72,809.35

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Solution

The fourth proportional to 123,794.47, 170,837.08 and 72,809.35 is: 100,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,794.47 : 170,837.08 = 72,809.35 : x
  2. Step 2: Convert to fraction form
    123,794.47/170,837.08 = 72,809.35/x
  3. Step 3: Cross multiply
    123,794.47x = 170,837.08 × 72,809.35
  4. Step 4: Simplify right side
    123,794.47x = 12,438,536,141.58
  5. Step 5: Solve for x
    x = 12,438,536,141.58/123,794.47
  6. Step 6: Final answer
    x = 100,477.32

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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.