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Finding the Fourth Proportional to 77,709.67, 107,239.17 and 43,718.17

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Solution

The fourth proportional to 77,709.67, 107,239.17 and 43,718.17 is: 60,330.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,709.67 : 107,239.17 = 43,718.17 : x
  2. Step 2: Convert to fraction form
    77,709.67/107,239.17 = 43,718.17/x
  3. Step 3: Cross multiply
    77,709.67x = 107,239.17 × 43,718.17
  4. Step 4: Simplify right side
    77,709.67x = 4,688,300,264.72
  5. Step 5: Solve for x
    x = 4,688,300,264.72/77,709.67
  6. Step 6: Final answer
    x = 60,330.98

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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.