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Finding the Fourth Proportional to 125,099.96, 172,466.35 and 79,136.74

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Solution

The fourth proportional to 125,099.96, 172,466.35 and 79,136.74 is: 109,100.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,099.96 : 172,466.35 = 79,136.74 : x
  2. Step 2: Convert to fraction form
    125,099.96/172,466.35 = 79,136.74/x
  3. Step 3: Cross multiply
    125,099.96x = 172,466.35 × 79,136.74
  4. Step 4: Simplify right side
    125,099.96x = 13,648,424,069.69
  5. Step 5: Solve for x
    x = 13,648,424,069.69/125,099.96
  6. Step 6: Final answer
    x = 109,100.15

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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.