Home / 85,868.58-118,361.72-67,689.66

Finding the Fourth Proportional to 85,868.58, 118,361.72 and 67,689.66

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Solution

The fourth proportional to 85,868.58, 118,361.72 and 67,689.66 is: 93,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,868.58 : 118,361.72 = 67,689.66 : x
  2. Step 2: Convert to fraction form
    85,868.58/118,361.72 = 67,689.66/x
  3. Step 3: Cross multiply
    85,868.58x = 118,361.72 × 67,689.66
  4. Step 4: Simplify right side
    85,868.58x = 8,011,864,583.82
  5. Step 5: Solve for x
    x = 8,011,864,583.82/85,868.58
  6. Step 6: Final answer
    x = 93,303.80

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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.