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Finding the Fourth Proportional to 281,042.95, 387,848.51 and 153,718.54

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Solution

The fourth proportional to 281,042.95, 387,848.51 and 153,718.54 is: 212,136.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,042.95 : 387,848.51 = 153,718.54 : x
  2. Step 2: Convert to fraction form
    281,042.95/387,848.51 = 153,718.54/x
  3. Step 3: Cross multiply
    281,042.95x = 387,848.51 × 153,718.54
  4. Step 4: Simplify right side
    281,042.95x = 59,619,506,698.38
  5. Step 5: Solve for x
    x = 59,619,506,698.38/281,042.95
  6. Step 6: Final answer
    x = 212,136.64

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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.