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Finding the Fourth Proportional to 281,016.40, 387,808.32 and 153,700.18

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Solution

The fourth proportional to 281,016.40, 387,808.32 and 153,700.18 is: 212,109.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,016.40 : 387,808.32 = 153,700.18 : x
  2. Step 2: Convert to fraction form
    281,016.40/387,808.32 = 153,700.18/x
  3. Step 3: Cross multiply
    281,016.40x = 387,808.32 × 153,700.18
  4. Step 4: Simplify right side
    281,016.40x = 59,606,208,589.50
  5. Step 5: Solve for x
    x = 59,606,208,589.50/281,016.40
  6. Step 6: Final answer
    x = 212,109.36

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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.