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Finding the Fourth Proportional to 134,805.60, 186,021.72 and 78,206.04

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Solution

The fourth proportional to 134,805.60, 186,021.72 and 78,206.04 is: 107,918.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,805.60 : 186,021.72 = 78,206.04 : x
  2. Step 2: Convert to fraction form
    134,805.60/186,021.72 = 78,206.04/x
  3. Step 3: Cross multiply
    134,805.60x = 186,021.72 × 78,206.04
  4. Step 4: Simplify right side
    134,805.60x = 14,548,022,075.19
  5. Step 5: Solve for x
    x = 14,548,022,075.19/134,805.60
  6. Step 6: Final answer
    x = 107,918.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.