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Finding the Fourth Proportional to 72,223.60, 108,421.80 and 40,658.80

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Solution

The fourth proportional to 72,223.60, 108,421.80 and 40,658.80 is: 61,036.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,223.60 : 108,421.80 = 40,658.80 : x
  2. Step 2: Convert to fraction form
    72,223.60/108,421.80 = 40,658.80/x
  3. Step 3: Cross multiply
    72,223.60x = 108,421.80 × 40,658.80
  4. Step 4: Simplify right side
    72,223.60x = 4,408,300,281.84
  5. Step 5: Solve for x
    x = 4,408,300,281.84/72,223.60
  6. Step 6: Final answer
    x = 61,036.84

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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.