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Finding the Fourth Proportional to 169,643.60, 254,465.40 and 90,717.20

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Solution

The fourth proportional to 169,643.60, 254,465.40 and 90,717.20 is: 136,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,643.60 : 254,465.40 = 90,717.20 : x
  2. Step 2: Convert to fraction form
    169,643.60/254,465.40 = 90,717.20/x
  3. Step 3: Cross multiply
    169,643.60x = 254,465.40 × 90,717.20
  4. Step 4: Simplify right side
    169,643.60x = 23,084,388,584.88
  5. Step 5: Solve for x
    x = 23,084,388,584.88/169,643.60
  6. Step 6: Final answer
    x = 136,075.80

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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.