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Finding the Fourth Proportional to 75,667.80, 113,501.70 and 69,981.60

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Solution

The fourth proportional to 75,667.80, 113,501.70 and 69,981.60 is: 104,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,667.80 : 113,501.70 = 69,981.60 : x
  2. Step 2: Convert to fraction form
    75,667.80/113,501.70 = 69,981.60/x
  3. Step 3: Cross multiply
    75,667.80x = 113,501.70 × 69,981.60
  4. Step 4: Simplify right side
    75,667.80x = 7,943,030,568.72
  5. Step 5: Solve for x
    x = 7,943,030,568.72/75,667.80
  6. Step 6: Final answer
    x = 104,972.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.