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Finding the Fourth Proportional to 78,952,510.64, 108,847,315.68 and 55,399,045.52

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Solution

The fourth proportional to 78,952,510.64, 108,847,315.68 and 55,399,045.52 is: 76,375,498.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,952,510.64 : 108,847,315.68 = 55,399,045.52 : x
  2. Step 2: Convert to fraction form
    78,952,510.64/108,847,315.68 = 55,399,045.52/x
  3. Step 3: Cross multiply
    78,952,510.64x = 108,847,315.68 × 55,399,045.52
  4. Step 4: Simplify right side
    78,952,510.64x = 6,030,037,396,086,131
  5. Step 5: Solve for x
    x = 6,030,037,396,086,131/78,952,510.64
  6. Step 6: Final answer
    x = 76,375,498.98

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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.