Home / 85,640.64-118,187.28-47,915.16

Finding the Fourth Proportional to 85,640.64, 118,187.28 and 47,915.16

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Solution

The fourth proportional to 85,640.64, 118,187.28 and 47,915.16 is: 66,124.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,640.64 : 118,187.28 = 47,915.16 : x
  2. Step 2: Convert to fraction form
    85,640.64/118,187.28 = 47,915.16/x
  3. Step 3: Cross multiply
    85,640.64x = 118,187.28 × 47,915.16
  4. Step 4: Simplify right side
    85,640.64x = 5,662,962,431.16
  5. Step 5: Solve for x
    x = 5,662,962,431.16/85,640.64
  6. Step 6: Final answer
    x = 66,124.71

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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.