Home / 66,681.56-91,985.82-39,815.48

Finding the Fourth Proportional to 66,681.56, 91,985.82 and 39,815.48

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Solution

The fourth proportional to 66,681.56, 91,985.82 and 39,815.48 is: 54,924.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,681.56 : 91,985.82 = 39,815.48 : x
  2. Step 2: Convert to fraction form
    66,681.56/91,985.82 = 39,815.48/x
  3. Step 3: Cross multiply
    66,681.56x = 91,985.82 × 39,815.48
  4. Step 4: Simplify right side
    66,681.56x = 3,662,459,576.49
  5. Step 5: Solve for x
    x = 3,662,459,576.49/66,681.56
  6. Step 6: Final answer
    x = 54,924.62

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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.