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Finding the Fourth Proportional to 268,389.04, 402,585.28 and 78,848.64

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Solution

The fourth proportional to 268,389.04, 402,585.28 and 78,848.64 is: 118,273.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,389.04 : 402,585.28 = 78,848.64 : x
  2. Step 2: Convert to fraction form
    268,389.04/402,585.28 = 78,848.64/x
  3. Step 3: Cross multiply
    268,389.04x = 402,585.28 × 78,848.64
  4. Step 4: Simplify right side
    268,389.04x = 31,743,299,799.09
  5. Step 5: Solve for x
    x = 31,743,299,799.09/268,389.04
  6. Step 6: Final answer
    x = 118,273.46

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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.