Home / 78,275.21-117,430.73-33,909.35

Finding the Fourth Proportional to 78,275.21, 117,430.73 and 33,909.35

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Solution

The fourth proportional to 78,275.21, 117,430.73 and 33,909.35 is: 50,871.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,275.21 : 117,430.73 = 33,909.35 : x
  2. Step 2: Convert to fraction form
    78,275.21/117,430.73 = 33,909.35/x
  3. Step 3: Cross multiply
    78,275.21x = 117,430.73 × 33,909.35
  4. Step 4: Simplify right side
    78,275.21x = 3,981,998,967.63
  5. Step 5: Solve for x
    x = 3,981,998,967.63/78,275.21
  6. Step 6: Final answer
    x = 50,871.78

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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.