Home / 85,911.28-118,505.16-56,839.60

Finding the Fourth Proportional to 85,911.28, 118,505.16 and 56,839.60

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Solution

The fourth proportional to 85,911.28, 118,505.16 and 56,839.60 is: 78,403.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,911.28 : 118,505.16 = 56,839.60 : x
  2. Step 2: Convert to fraction form
    85,911.28/118,505.16 = 56,839.60/x
  3. Step 3: Cross multiply
    85,911.28x = 118,505.16 × 56,839.60
  4. Step 4: Simplify right side
    85,911.28x = 6,735,785,892.34
  5. Step 5: Solve for x
    x = 6,735,785,892.34/85,911.28
  6. Step 6: Final answer
    x = 78,403.98

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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.