Home / 76,681.18-105,782.70-66,052.36

Finding the Fourth Proportional to 76,681.18, 105,782.70 and 66,052.36

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Solution

The fourth proportional to 76,681.18, 105,782.70 and 66,052.36 is: 91,120.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,681.18 : 105,782.70 = 66,052.36 : x
  2. Step 2: Convert to fraction form
    76,681.18/105,782.70 = 66,052.36/x
  3. Step 3: Cross multiply
    76,681.18x = 105,782.70 × 66,052.36
  4. Step 4: Simplify right side
    76,681.18x = 6,987,196,982.17
  5. Step 5: Solve for x
    x = 6,987,196,982.17/76,681.18
  6. Step 6: Final answer
    x = 91,120.10

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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.