Home / 268,154.51-402,287.04-78,621.12

Finding the Fourth Proportional to 268,154.51, 402,287.04 and 78,621.12

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Solution

The fourth proportional to 268,154.51, 402,287.04 and 78,621.12 is: 117,947.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,154.51 : 402,287.04 = 78,621.12 : x
  2. Step 2: Convert to fraction form
    268,154.51/402,287.04 = 78,621.12/x
  3. Step 3: Cross multiply
    268,154.51x = 402,287.04 × 78,621.12
  4. Step 4: Simplify right side
    268,154.51x = 31,628,257,646.28
  5. Step 5: Solve for x
    x = 31,628,257,646.28/268,154.51
  6. Step 6: Final answer
    x = 117,947.89

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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.