Home / 105,487.42-145,572.84-57,743.80

Finding the Fourth Proportional to 105,487.42, 145,572.84 and 57,743.80

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Solution

The fourth proportional to 105,487.42, 145,572.84 and 57,743.80 is: 79,686.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,487.42 : 145,572.84 = 57,743.80 : x
  2. Step 2: Convert to fraction form
    105,487.42/145,572.84 = 57,743.80/x
  3. Step 3: Cross multiply
    105,487.42x = 145,572.84 × 57,743.80
  4. Step 4: Simplify right side
    105,487.42x = 8,405,928,958.39
  5. Step 5: Solve for x
    x = 8,405,928,958.39/105,487.42
  6. Step 6: Final answer
    x = 79,686.55

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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.