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Finding the Fourth Proportional to 60,790.40, 83,928.68 and 39,291.40

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Solution

The fourth proportional to 60,790.40, 83,928.68 and 39,291.40 is: 54,246.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,790.40 : 83,928.68 = 39,291.40 : x
  2. Step 2: Convert to fraction form
    60,790.40/83,928.68 = 39,291.40/x
  3. Step 3: Cross multiply
    60,790.40x = 83,928.68 × 39,291.40
  4. Step 4: Simplify right side
    60,790.40x = 3,297,675,337.35
  5. Step 5: Solve for x
    x = 3,297,675,337.35/60,790.40
  6. Step 6: Final answer
    x = 54,246.65

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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.