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Finding the Fourth Proportional to 281,143.40, 387,987.56 and 153,818.99

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Solution

The fourth proportional to 281,143.40, 387,987.56 and 153,818.99 is: 212,275.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,143.40 : 387,987.56 = 153,818.99 : x
  2. Step 2: Convert to fraction form
    281,143.40/387,987.56 = 153,818.99/x
  3. Step 3: Cross multiply
    281,143.40x = 387,987.56 × 153,818.99
  4. Step 4: Simplify right side
    281,143.40x = 59,679,853,056.37
  5. Step 5: Solve for x
    x = 59,679,853,056.37/281,143.40
  6. Step 6: Final answer
    x = 212,275.49

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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.