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Finding the Fourth Proportional to 64,138.86, 88,526.79 and 38,983.50

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Solution

The fourth proportional to 64,138.86, 88,526.79 and 38,983.50 is: 53,806.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,138.86 : 88,526.79 = 38,983.50 : x
  2. Step 2: Convert to fraction form
    64,138.86/88,526.79 = 38,983.50/x
  3. Step 3: Cross multiply
    64,138.86x = 88,526.79 × 38,983.50
  4. Step 4: Simplify right side
    64,138.86x = 3,451,084,117.97
  5. Step 5: Solve for x
    x = 3,451,084,117.97/64,138.86
  6. Step 6: Final answer
    x = 53,806.45

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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.