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Finding the Fourth Proportional to 186,245.40, 279,378.90 and 53,135.40

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Solution

The fourth proportional to 186,245.40, 279,378.90 and 53,135.40 is: 79,706.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,245.40 : 279,378.90 = 53,135.40 : x
  2. Step 2: Convert to fraction form
    186,245.40/279,378.90 = 53,135.40/x
  3. Step 3: Cross multiply
    186,245.40x = 279,378.90 × 53,135.40
  4. Step 4: Simplify right side
    186,245.40x = 14,844,909,603.06
  5. Step 5: Solve for x
    x = 14,844,909,603.06/186,245.40
  6. Step 6: Final answer
    x = 79,706.18

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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.