Home / 85,715.52-118,286.64-47,990.40

Finding the Fourth Proportional to 85,715.52, 118,286.64 and 47,990.40

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Solution

The fourth proportional to 85,715.52, 118,286.64 and 47,990.40 is: 66,226.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,715.52 : 118,286.64 = 47,990.40 : x
  2. Step 2: Convert to fraction form
    85,715.52/118,286.64 = 47,990.40/x
  3. Step 3: Cross multiply
    85,715.52x = 118,286.64 × 47,990.40
  4. Step 4: Simplify right side
    85,715.52x = 5,676,623,168.26
  5. Step 5: Solve for x
    x = 5,676,623,168.26/85,715.52
  6. Step 6: Final answer
    x = 66,226.32

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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.