Home / 78,219.24-117,258.65-28,287.60

Finding the Fourth Proportional to 78,219.24, 117,258.65 and 28,287.60

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Solution

The fourth proportional to 78,219.24, 117,258.65 and 28,287.60 is: 42,406.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,219.24 : 117,258.65 = 28,287.60 : x
  2. Step 2: Convert to fraction form
    78,219.24/117,258.65 = 28,287.60/x
  3. Step 3: Cross multiply
    78,219.24x = 117,258.65 × 28,287.60
  4. Step 4: Simplify right side
    78,219.24x = 3,316,965,787.74
  5. Step 5: Solve for x
    x = 3,316,965,787.74/78,219.24
  6. Step 6: Final answer
    x = 42,406.01

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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.