Home / 281,065.13-387,870.39-153,740.72

Finding the Fourth Proportional to 281,065.13, 387,870.39 and 153,740.72

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Solution

The fourth proportional to 281,065.13, 387,870.39 and 153,740.72 is: 212,162.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,065.13 : 387,870.39 = 153,740.72 : x
  2. Step 2: Convert to fraction form
    281,065.13/387,870.39 = 153,740.72/x
  3. Step 3: Cross multiply
    281,065.13x = 387,870.39 × 153,740.72
  4. Step 4: Simplify right side
    281,065.13x = 59,631,473,025.28
  5. Step 5: Solve for x
    x = 59,631,473,025.28/281,065.13
  6. Step 6: Final answer
    x = 212,162.47

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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.