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Finding the Fourth Proportional to 151,485.60, 209,065.68 and 91,075.92

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Solution

The fourth proportional to 151,485.60, 209,065.68 and 91,075.92 is: 125,694.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,485.60 : 209,065.68 = 91,075.92 : x
  2. Step 2: Convert to fraction form
    151,485.60/209,065.68 = 91,075.92/x
  3. Step 3: Cross multiply
    151,485.60x = 209,065.68 × 91,075.92
  4. Step 4: Simplify right side
    151,485.60x = 19,040,849,146.43
  5. Step 5: Solve for x
    x = 19,040,849,146.43/151,485.60
  6. Step 6: Final answer
    x = 125,694.12

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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.