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Finding the Fourth Proportional to 72,479.60, 100,022.58 and 40,647.82

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Solution

The fourth proportional to 72,479.60, 100,022.58 and 40,647.82 is: 56,094.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,479.60 : 100,022.58 = 40,647.82 : x
  2. Step 2: Convert to fraction form
    72,479.60/100,022.58 = 40,647.82/x
  3. Step 3: Cross multiply
    72,479.60x = 100,022.58 × 40,647.82
  4. Step 4: Simplify right side
    72,479.60x = 4,065,699,124.42
  5. Step 5: Solve for x
    x = 4,065,699,124.42/72,479.60
  6. Step 6: Final answer
    x = 56,094.39

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1.5x scale

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.