Home / 76,864.80-115,297.20-61,312.80

Finding the Fourth Proportional to 76,864.80, 115,297.20 and 61,312.80

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Solution

The fourth proportional to 76,864.80, 115,297.20 and 61,312.80 is: 91,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,864.80 : 115,297.20 = 61,312.80 : x
  2. Step 2: Convert to fraction form
    76,864.80/115,297.20 = 61,312.80/x
  3. Step 3: Cross multiply
    76,864.80x = 115,297.20 × 61,312.80
  4. Step 4: Simplify right side
    76,864.80x = 7,069,194,164.16
  5. Step 5: Solve for x
    x = 7,069,194,164.16/76,864.80
  6. Step 6: Final answer
    x = 91,969.20

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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.