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Finding the Fourth Proportional to 85,367.86, 127,946.89 and 60,415

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Solution

The fourth proportional to 85,367.86, 127,946.89 and 60,415 is: 90,548.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,367.86 : 127,946.89 = 60,415 : x
  2. Step 2: Convert to fraction form
    85,367.86/127,946.89 = 60,415/x
  3. Step 3: Cross multiply
    85,367.86x = 127,946.89 × 60,415
  4. Step 4: Simplify right side
    85,367.86x = 7,729,911,359.35
  5. Step 5: Solve for x
    x = 7,729,911,359.35/85,367.86
  6. Step 6: Final answer
    x = 90,548.26

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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.