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Finding the Fourth Proportional to 281,085.42, 387,897.75 and 153,760.98

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Solution

The fourth proportional to 281,085.42, 387,897.75 and 153,760.98 is: 212,190.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,085.42 : 387,897.75 = 153,760.98 : x
  2. Step 2: Convert to fraction form
    281,085.42/387,897.75 = 153,760.98/x
  3. Step 3: Cross multiply
    281,085.42x = 387,897.75 × 153,760.98
  4. Step 4: Simplify right side
    281,085.42x = 59,643,538,179.80
  5. Step 5: Solve for x
    x = 59,643,538,179.80/281,085.42
  6. Step 6: Final answer
    x = 212,190.08

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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.