Home / 78,155.43-117,232.29-18,991.14

Finding the Fourth Proportional to 78,155.43, 117,232.29 and 18,991.14

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Solution

The fourth proportional to 78,155.43, 117,232.29 and 18,991.14 is: 28,486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,155.43 : 117,232.29 = 18,991.14 : x
  2. Step 2: Convert to fraction form
    78,155.43/117,232.29 = 18,991.14/x
  3. Step 3: Cross multiply
    78,155.43x = 117,232.29 × 18,991.14
  4. Step 4: Simplify right side
    78,155.43x = 2,226,374,831.91
  5. Step 5: Solve for x
    x = 2,226,374,831.91/78,155.43
  6. Step 6: Final answer
    x = 28,486.50

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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.