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Finding the Fourth Proportional to 118,451.86, 177,534.21 and 86,995.51

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Solution

The fourth proportional to 118,451.86, 177,534.21 and 86,995.51 is: 130,387.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,451.86 : 177,534.21 = 86,995.51 : x
  2. Step 2: Convert to fraction form
    118,451.86/177,534.21 = 86,995.51/x
  3. Step 3: Cross multiply
    118,451.86x = 177,534.21 × 86,995.51
  4. Step 4: Simplify right side
    118,451.86x = 15,444,679,141.40
  5. Step 5: Solve for x
    x = 15,444,679,141.40/118,451.86
  6. Step 6: Final answer
    x = 130,387.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.