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Finding the Fourth Proportional to 92,611.72, 138,868.98 and 48,129.76

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Solution

The fourth proportional to 92,611.72, 138,868.98 and 48,129.76 is: 72,169.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,611.72 : 138,868.98 = 48,129.76 : x
  2. Step 2: Convert to fraction form
    92,611.72/138,868.98 = 48,129.76/x
  3. Step 3: Cross multiply
    92,611.72x = 138,868.98 × 48,129.76
  4. Step 4: Simplify right side
    92,611.72x = 6,683,730,678.84
  5. Step 5: Solve for x
    x = 6,683,730,678.84/92,611.72
  6. Step 6: Final answer
    x = 72,169.38

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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.