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Finding the Fourth Proportional to 76,991.32, 106,240.98 and 45,154.36

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Solution

The fourth proportional to 76,991.32, 106,240.98 and 45,154.36 is: 62,308.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,991.32 : 106,240.98 = 45,154.36 : x
  2. Step 2: Convert to fraction form
    76,991.32/106,240.98 = 45,154.36/x
  3. Step 3: Cross multiply
    76,991.32x = 106,240.98 × 45,154.36
  4. Step 4: Simplify right side
    76,991.32x = 4,797,243,457.67
  5. Step 5: Solve for x
    x = 4,797,243,457.67/76,991.32
  6. Step 6: Final answer
    x = 62,308.89

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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.