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Finding the Fourth Proportional to 118,887.40, 178,331.10 and 39,975.40

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Solution

The fourth proportional to 118,887.40, 178,331.10 and 39,975.40 is: 59,963.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,887.40 : 178,331.10 = 39,975.40 : x
  2. Step 2: Convert to fraction form
    118,887.40/178,331.10 = 39,975.40/x
  3. Step 3: Cross multiply
    118,887.40x = 178,331.10 × 39,975.40
  4. Step 4: Simplify right side
    118,887.40x = 7,128,857,054.94
  5. Step 5: Solve for x
    x = 7,128,857,054.94/118,887.40
  6. Step 6: Final answer
    x = 59,963.10

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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.