Home / 280,784.16-421,114.14-81,061.11

Finding the Fourth Proportional to 280,784.16, 421,114.14 and 81,061.11

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Solution

The fourth proportional to 280,784.16, 421,114.14 and 81,061.11 is: 121,573.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,784.16 : 421,114.14 = 81,061.11 : x
  2. Step 2: Convert to fraction form
    280,784.16/421,114.14 = 81,061.11/x
  3. Step 3: Cross multiply
    280,784.16x = 421,114.14 × 81,061.11
  4. Step 4: Simplify right side
    280,784.16x = 34,135,979,625.10
  5. Step 5: Solve for x
    x = 34,135,979,625.10/280,784.16
  6. Step 6: Final answer
    x = 121,573.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.