Home / 76,965.18-115,459.58-20,807.13

Finding the Fourth Proportional to 76,965.18, 115,459.58 and 20,807.13

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Solution

The fourth proportional to 76,965.18, 115,459.58 and 20,807.13 is: 31,213.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,965.18 : 115,459.58 = 20,807.13 : x
  2. Step 2: Convert to fraction form
    76,965.18/115,459.58 = 20,807.13/x
  3. Step 3: Cross multiply
    76,965.18x = 115,459.58 × 20,807.13
  4. Step 4: Simplify right side
    76,965.18x = 2,402,382,490.81
  5. Step 5: Solve for x
    x = 2,402,382,490.81/76,965.18
  6. Step 6: Final answer
    x = 31,213.89

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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.