Home / 85,785.15-118,355.13-51,780.72

Finding the Fourth Proportional to 85,785.15, 118,355.13 and 51,780.72

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Solution

The fourth proportional to 85,785.15, 118,355.13 and 51,780.72 is: 71,440.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,785.15 : 118,355.13 = 51,780.72 : x
  2. Step 2: Convert to fraction form
    85,785.15/118,355.13 = 51,780.72/x
  3. Step 3: Cross multiply
    85,785.15x = 118,355.13 × 51,780.72
  4. Step 4: Simplify right side
    85,785.15x = 6,128,513,847.09
  5. Step 5: Solve for x
    x = 6,128,513,847.09/85,785.15
  6. Step 6: Final answer
    x = 71,440.26

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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.