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Finding the Fourth Proportional to 85,710.60, 118,287.95 and 49,911.84

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Solution

The fourth proportional to 85,710.60, 118,287.95 and 49,911.84 is: 68,882.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,710.60 : 118,287.95 = 49,911.84 : x
  2. Step 2: Convert to fraction form
    85,710.60/118,287.95 = 49,911.84/x
  3. Step 3: Cross multiply
    85,710.60x = 118,287.95 × 49,911.84
  4. Step 4: Simplify right side
    85,710.60x = 5,903,968,984.77
  5. Step 5: Solve for x
    x = 5,903,968,984.77/85,710.60
  6. Step 6: Final answer
    x = 68,882.60

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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.