Home / 142,485.12-213,578.64-47,691.36

Finding the Fourth Proportional to 142,485.12, 213,578.64 and 47,691.36

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Solution

The fourth proportional to 142,485.12, 213,578.64 and 47,691.36 is: 71,487.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,485.12 : 213,578.64 = 47,691.36 : x
  2. Step 2: Convert to fraction form
    142,485.12/213,578.64 = 47,691.36/x
  3. Step 3: Cross multiply
    142,485.12x = 213,578.64 × 47,691.36
  4. Step 4: Simplify right side
    142,485.12x = 10,185,855,808.55
  5. Step 5: Solve for x
    x = 10,185,855,808.55/142,485.12
  6. Step 6: Final answer
    x = 71,487.15

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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.