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Finding the Fourth Proportional to 281,272.34, 388,155.82 and 153,947.93

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Solution

The fourth proportional to 281,272.34, 388,155.82 and 153,947.93 is: 212,448.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,272.34 : 388,155.82 = 153,947.93 : x
  2. Step 2: Convert to fraction form
    281,272.34/388,155.82 = 153,947.93/x
  3. Step 3: Cross multiply
    281,272.34x = 388,155.82 × 153,947.93
  4. Step 4: Simplify right side
    281,272.34x = 59,755,785,006.45
  5. Step 5: Solve for x
    x = 59,755,785,006.45/281,272.34
  6. Step 6: Final answer
    x = 212,448.14

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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.