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Finding the Fourth Proportional to 76,379.70, 114,569.55 and 72,005.70

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Solution

The fourth proportional to 76,379.70, 114,569.55 and 72,005.70 is: 108,008.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,379.70 : 114,569.55 = 72,005.70 : x
  2. Step 2: Convert to fraction form
    76,379.70/114,569.55 = 72,005.70/x
  3. Step 3: Cross multiply
    76,379.70x = 114,569.55 × 72,005.70
  4. Step 4: Simplify right side
    76,379.70x = 8,249,660,646.44
  5. Step 5: Solve for x
    x = 8,249,660,646.44/76,379.70
  6. Step 6: Final answer
    x = 108,008.55

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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.