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Finding the Fourth Proportional to 65,740.86, 90,722.97 and 60,718.05

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Solution

The fourth proportional to 65,740.86, 90,722.97 and 60,718.05 is: 83,791.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,740.86 : 90,722.97 = 60,718.05 : x
  2. Step 2: Convert to fraction form
    65,740.86/90,722.97 = 60,718.05/x
  3. Step 3: Cross multiply
    65,740.86x = 90,722.97 × 60,718.05
  4. Step 4: Simplify right side
    65,740.86x = 5,508,521,828.61
  5. Step 5: Solve for x
    x = 5,508,521,828.61/65,740.86
  6. Step 6: Final answer
    x = 83,791.45

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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.