Home / 85,728.12-118,253.25-56,656.68

Finding the Fourth Proportional to 85,728.12, 118,253.25 and 56,656.68

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Solution

The fourth proportional to 85,728.12, 118,253.25 and 56,656.68 is: 78,152.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,728.12 : 118,253.25 = 56,656.68 : x
  2. Step 2: Convert to fraction form
    85,728.12/118,253.25 = 56,656.68/x
  3. Step 3: Cross multiply
    85,728.12x = 118,253.25 × 56,656.68
  4. Step 4: Simplify right side
    85,728.12x = 6,699,836,544.21
  5. Step 5: Solve for x
    x = 6,699,836,544.21/85,728.12
  6. Step 6: Final answer
    x = 78,152.15

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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.