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Finding the Fourth Proportional to 85,840.47, 118,460.10 and 47,602.71

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Solution

The fourth proportional to 85,840.47, 118,460.10 and 47,602.71 is: 65,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840.47 : 118,460.10 = 47,602.71 : x
  2. Step 2: Convert to fraction form
    85,840.47/118,460.10 = 47,602.71/x
  3. Step 3: Cross multiply
    85,840.47x = 118,460.10 × 47,602.71
  4. Step 4: Simplify right side
    85,840.47x = 5,639,021,786.87
  5. Step 5: Solve for x
    x = 5,639,021,786.87/85,840.47
  6. Step 6: Final answer
    x = 65,691.88

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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.