Home / 78,686.10-118,087.92-45,361.68

Finding the Fourth Proportional to 78,686.10, 118,087.92 and 45,361.68

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Solution

The fourth proportional to 78,686.10, 118,087.92 and 45,361.68 is: 68,076.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.10 : 118,087.92 = 45,361.68 : x
  2. Step 2: Convert to fraction form
    78,686.10/118,087.92 = 45,361.68/x
  3. Step 3: Cross multiply
    78,686.10x = 118,087.92 × 45,361.68
  4. Step 4: Simplify right side
    78,686.10x = 5,356,666,438.91
  5. Step 5: Solve for x
    x = 5,356,666,438.91/78,686.10
  6. Step 6: Final answer
    x = 68,076.40

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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.