Home / 85,639.90-118,175.05-51,177.79

Finding the Fourth Proportional to 85,639.90, 118,175.05 and 51,177.79

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Solution

The fourth proportional to 85,639.90, 118,175.05 and 51,177.79 is: 70,620.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,639.90 : 118,175.05 = 51,177.79 : x
  2. Step 2: Convert to fraction form
    85,639.90/118,175.05 = 51,177.79/x
  3. Step 3: Cross multiply
    85,639.90x = 118,175.05 × 51,177.79
  4. Step 4: Simplify right side
    85,639.90x = 6,047,937,892.14
  5. Step 5: Solve for x
    x = 6,047,937,892.14/85,639.90
  6. Step 6: Final answer
    x = 70,620.57

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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.