Home / 280,086,217.10-420,191,787.09-86,017,217.66

Finding the Fourth Proportional to 280,086,217.10, 420,191,787.09 and 86,017,217.66

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Solution

The fourth proportional to 280,086,217.10, 420,191,787.09 and 86,017,217.66 is: 129,045,009.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,086,217.10 : 420,191,787.09 = 86,017,217.66 : x
  2. Step 2: Convert to fraction form
    280,086,217.10/420,191,787.09 = 86,017,217.66/x
  3. Step 3: Cross multiply
    280,086,217.10x = 420,191,787.09 × 86,017,217.66
  4. Step 4: Simplify right side
    280,086,217.10x = 36,143,728,409,064,904
  5. Step 5: Solve for x
    x = 36,143,728,409,064,904/280,086,217.10
  6. Step 6: Final answer
    x = 129,045,009.01

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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.