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Finding the Fourth Proportional to 154,312.80, 212,953.20 and 90,651.60

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Solution

The fourth proportional to 154,312.80, 212,953.20 and 90,651.60 is: 125,100.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,312.80 : 212,953.20 = 90,651.60 : x
  2. Step 2: Convert to fraction form
    154,312.80/212,953.20 = 90,651.60/x
  3. Step 3: Cross multiply
    154,312.80x = 212,953.20 × 90,651.60
  4. Step 4: Simplify right side
    154,312.80x = 19,304,548,305.12
  5. Step 5: Solve for x
    x = 19,304,548,305.12/154,312.80
  6. Step 6: Final answer
    x = 125,100.11

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