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Finding the Fourth Proportional to 281,069.82, 387,913.93 and 158,587.40

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Solution

The fourth proportional to 281,069.82, 387,913.93 and 158,587.40 is: 218,871.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,069.82 : 387,913.93 = 158,587.40 : x
  2. Step 2: Convert to fraction form
    281,069.82/387,913.93 = 158,587.40/x
  3. Step 3: Cross multiply
    281,069.82x = 387,913.93 × 158,587.40
  4. Step 4: Simplify right side
    281,069.82x = 61,518,262,155.80
  5. Step 5: Solve for x
    x = 61,518,262,155.80/281,069.82
  6. Step 6: Final answer
    x = 218,871.82

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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.