Home / 281,121.15-387,973.89-153,815.88

Finding the Fourth Proportional to 281,121.15, 387,973.89 and 153,815.88

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Solution

The fourth proportional to 281,121.15, 387,973.89 and 153,815.88 is: 212,280.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,121.15 : 387,973.89 = 153,815.88 : x
  2. Step 2: Convert to fraction form
    281,121.15/387,973.89 = 153,815.88/x
  3. Step 3: Cross multiply
    281,121.15x = 387,973.89 × 153,815.88
  4. Step 4: Simplify right side
    281,121.15x = 59,676,545,307.37
  5. Step 5: Solve for x
    x = 59,676,545,307.37/281,121.15
  6. Step 6: Final answer
    x = 212,280.52

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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.