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Finding the Fourth Proportional to 80,312.86, 110,730.99 and 51,581.80

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Solution

The fourth proportional to 80,312.86, 110,730.99 and 51,581.80 is: 71,118.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,312.86 : 110,730.99 = 51,581.80 : x
  2. Step 2: Convert to fraction form
    80,312.86/110,730.99 = 51,581.80/x
  3. Step 3: Cross multiply
    80,312.86x = 110,730.99 × 51,581.80
  4. Step 4: Simplify right side
    80,312.86x = 5,711,703,779.98
  5. Step 5: Solve for x
    x = 5,711,703,779.98/80,312.86
  6. Step 6: Final answer
    x = 71,118.17

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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.