Home / 90,866.43-125,434.45-64,689.30

Finding the Fourth Proportional to 90,866.43, 125,434.45 and 64,689.30

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Solution

The fourth proportional to 90,866.43, 125,434.45 and 64,689.30 is: 89,298.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.43 : 125,434.45 = 64,689.30 : x
  2. Step 2: Convert to fraction form
    90,866.43/125,434.45 = 64,689.30/x
  3. Step 3: Cross multiply
    90,866.43x = 125,434.45 × 64,689.30
  4. Step 4: Simplify right side
    90,866.43x = 8,114,266,136.13
  5. Step 5: Solve for x
    x = 8,114,266,136.13/90,866.43
  6. Step 6: Final answer
    x = 89,298.83

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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.