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Finding the Fourth Proportional to 72,988.35, 100,723.95 and 39,454.35

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Solution

The fourth proportional to 72,988.35, 100,723.95 and 39,454.35 is: 54,447.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.35 : 100,723.95 = 39,454.35 : x
  2. Step 2: Convert to fraction form
    72,988.35/100,723.95 = 39,454.35/x
  3. Step 3: Cross multiply
    72,988.35x = 100,723.95 × 39,454.35
  4. Step 4: Simplify right side
    72,988.35x = 3,973,997,976.68
  5. Step 5: Solve for x
    x = 3,973,997,976.68/72,988.35
  6. Step 6: Final answer
    x = 54,447.02

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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.