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Finding the Fourth Proportional to 72,759.51, 100,407.11 and 40,928.45

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Solution

The fourth proportional to 72,759.51, 100,407.11 and 40,928.45 is: 56,480.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,759.51 : 100,407.11 = 40,928.45 : x
  2. Step 2: Convert to fraction form
    72,759.51/100,407.11 = 40,928.45/x
  3. Step 3: Cross multiply
    72,759.51x = 100,407.11 × 40,928.45
  4. Step 4: Simplify right side
    72,759.51x = 4,109,506,674.60
  5. Step 5: Solve for x
    x = 4,109,506,674.60/72,759.51
  6. Step 6: Final answer
    x = 56,480.68

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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.