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Finding the Fourth Proportional to 79,885.90, 119,705.67 and 39,312.85

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Solution

The fourth proportional to 79,885.90, 119,705.67 and 39,312.85 is: 58,908.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,885.90 : 119,705.67 = 39,312.85 : x
  2. Step 2: Convert to fraction form
    79,885.90/119,705.67 = 39,312.85/x
  3. Step 3: Cross multiply
    79,885.90x = 119,705.67 × 39,312.85
  4. Step 4: Simplify right side
    79,885.90x = 4,705,971,048.86
  5. Step 5: Solve for x
    x = 4,705,971,048.86/79,885.90
  6. Step 6: Final answer
    x = 58,908.66

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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.