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Finding the Fourth Proportional to 77,491.84, 106,666.71 and 67,909.15

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Solution

The fourth proportional to 77,491.84, 106,666.71 and 67,909.15 is: 93,476.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,491.84 : 106,666.71 = 67,909.15 : x
  2. Step 2: Convert to fraction form
    77,491.84/106,666.71 = 67,909.15/x
  3. Step 3: Cross multiply
    77,491.84x = 106,666.71 × 67,909.15
  4. Step 4: Simplify right side
    77,491.84x = 7,243,645,609.40
  5. Step 5: Solve for x
    x = 7,243,645,609.40/77,491.84
  6. Step 6: Final answer
    x = 93,476.24

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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.