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Finding the Fourth Proportional to 64,510.40, 89,021.76 and 36,215.48

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Solution

The fourth proportional to 64,510.40, 89,021.76 and 36,215.48 is: 49,975.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,510.40 : 89,021.76 = 36,215.48 : x
  2. Step 2: Convert to fraction form
    64,510.40/89,021.76 = 36,215.48/x
  3. Step 3: Cross multiply
    64,510.40x = 89,021.76 × 36,215.48
  4. Step 4: Simplify right side
    64,510.40x = 3,223,965,768.84
  5. Step 5: Solve for x
    x = 3,223,965,768.84/64,510.40
  6. Step 6: Final answer
    x = 49,975.91

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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.