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Finding the Fourth Proportional to 123,212.40, 170,030.52 and 72,927.60

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Solution

The fourth proportional to 123,212.40, 170,030.52 and 72,927.60 is: 100,638.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,212.40 : 170,030.52 = 72,927.60 : x
  2. Step 2: Convert to fraction form
    123,212.40/170,030.52 = 72,927.60/x
  3. Step 3: Cross multiply
    123,212.40x = 170,030.52 × 72,927.60
  4. Step 4: Simplify right side
    123,212.40x = 12,399,917,750.35
  5. Step 5: Solve for x
    x = 12,399,917,750.35/123,212.40
  6. Step 6: Final answer
    x = 100,638.55

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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.