Home / 85,712.32-118,295.40-47,989

Finding the Fourth Proportional to 85,712.32, 118,295.40 and 47,989

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Solution

The fourth proportional to 85,712.32, 118,295.40 and 47,989 is: 66,231.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,712.32 : 118,295.40 = 47,989 : x
  2. Step 2: Convert to fraction form
    85,712.32/118,295.40 = 47,989/x
  3. Step 3: Cross multiply
    85,712.32x = 118,295.40 × 47,989
  4. Step 4: Simplify right side
    85,712.32x = 5,676,877,950.60
  5. Step 5: Solve for x
    x = 5,676,877,950.60/85,712.32
  6. Step 6: Final answer
    x = 66,231.76

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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.