Home / 286,579.78-429,931.78-86,915.50

Finding the Fourth Proportional to 286,579.78, 429,931.78 and 86,915.50

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Solution

The fourth proportional to 286,579.78, 429,931.78 and 86,915.50 is: 130,392.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,579.78 : 429,931.78 = 86,915.50 : x
  2. Step 2: Convert to fraction form
    286,579.78/429,931.78 = 86,915.50/x
  3. Step 3: Cross multiply
    286,579.78x = 429,931.78 × 86,915.50
  4. Step 4: Simplify right side
    286,579.78x = 37,367,735,624.59
  5. Step 5: Solve for x
    x = 37,367,735,624.59/286,579.78
  6. Step 6: Final answer
    x = 130,392.09

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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.