Home / 281,053.45-387,863-153,729.06

Finding the Fourth Proportional to 281,053.45, 387,863 and 153,729.06

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Solution

The fourth proportional to 281,053.45, 387,863 and 153,729.06 is: 212,151.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,053.45 : 387,863 = 153,729.06 : x
  2. Step 2: Convert to fraction form
    281,053.45/387,863 = 153,729.06/x
  3. Step 3: Cross multiply
    281,053.45x = 387,863 × 153,729.06
  4. Step 4: Simplify right side
    281,053.45x = 59,625,814,398.78
  5. Step 5: Solve for x
    x = 59,625,814,398.78/281,053.45
  6. Step 6: Final answer
    x = 212,151.16

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1.5x scale

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.