Home / 265,209.12-397,886.72-78,220.62

Finding the Fourth Proportional to 265,209.12, 397,886.72 and 78,220.62

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Solution

The fourth proportional to 265,209.12, 397,886.72 and 78,220.62 is: 117,352.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,209.12 : 397,886.72 = 78,220.62 : x
  2. Step 2: Convert to fraction form
    265,209.12/397,886.72 = 78,220.62/x
  3. Step 3: Cross multiply
    265,209.12x = 397,886.72 × 78,220.62
  4. Step 4: Simplify right side
    265,209.12x = 31,122,945,928.17
  5. Step 5: Solve for x
    x = 31,122,945,928.17/265,209.12
  6. Step 6: Final answer
    x = 117,352.47

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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.