Home / 286,228.20-429,342.30-86,579.40

Finding the Fourth Proportional to 286,228.20, 429,342.30 and 86,579.40

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Solution

The fourth proportional to 286,228.20, 429,342.30 and 86,579.40 is: 129,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,228.20 : 429,342.30 = 86,579.40 : x
  2. Step 2: Convert to fraction form
    286,228.20/429,342.30 = 86,579.40/x
  3. Step 3: Cross multiply
    286,228.20x = 429,342.30 × 86,579.40
  4. Step 4: Simplify right side
    286,228.20x = 37,172,198,728.62
  5. Step 5: Solve for x
    x = 37,172,198,728.62/286,228.20
  6. Step 6: Final answer
    x = 129,869.10

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1.5x scale

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.