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Finding the Fourth Proportional to 72,742.41, 100,369.47 and 42,521.89

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Solution

The fourth proportional to 72,742.41, 100,369.47 and 42,521.89 is: 58,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,742.41 : 100,369.47 = 42,521.89 : x
  2. Step 2: Convert to fraction form
    72,742.41/100,369.47 = 42,521.89/x
  3. Step 3: Cross multiply
    72,742.41x = 100,369.47 × 42,521.89
  4. Step 4: Simplify right side
    72,742.41x = 4,267,899,060.85
  5. Step 5: Solve for x
    x = 4,267,899,060.85/72,742.41
  6. Step 6: Final answer
    x = 58,671.40

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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.