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Finding the Fourth Proportional to 115,673.60, 173,218.80 and 85,930.40

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Solution

The fourth proportional to 115,673.60, 173,218.80 and 85,930.40 is: 128,678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,673.60 : 173,218.80 = 85,930.40 : x
  2. Step 2: Convert to fraction form
    115,673.60/173,218.80 = 85,930.40/x
  3. Step 3: Cross multiply
    115,673.60x = 173,218.80 × 85,930.40
  4. Step 4: Simplify right side
    115,673.60x = 14,884,760,771.52
  5. Step 5: Solve for x
    x = 14,884,760,771.52/115,673.60
  6. Step 6: Final answer
    x = 128,678.98

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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.