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Finding the Fourth Proportional to 79,782.95, 119,688.62 and 26,478.12

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Solution

The fourth proportional to 79,782.95, 119,688.62 and 26,478.12 is: 39,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,782.95 : 119,688.62 = 26,478.12 : x
  2. Step 2: Convert to fraction form
    79,782.95/119,688.62 = 26,478.12/x
  3. Step 3: Cross multiply
    79,782.95x = 119,688.62 × 26,478.12
  4. Step 4: Simplify right side
    79,782.95x = 3,169,129,510.60
  5. Step 5: Solve for x
    x = 3,169,129,510.60/79,782.95
  6. Step 6: Final answer
    x = 39,721.89

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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.