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Finding the Fourth Proportional to 70,779.91, 106,206.98 and 28,664.47

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Solution

The fourth proportional to 70,779.91, 106,206.98 and 28,664.47 is: 43,011.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,779.91 : 106,206.98 = 28,664.47 : x
  2. Step 2: Convert to fraction form
    70,779.91/106,206.98 = 28,664.47/x
  3. Step 3: Cross multiply
    70,779.91x = 106,206.98 × 28,664.47
  4. Step 4: Simplify right side
    70,779.91x = 3,044,366,792.00
  5. Step 5: Solve for x
    x = 3,044,366,792.00/70,779.91
  6. Step 6: Final answer
    x = 43,011.74

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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.