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Finding the Fourth Proportional to 64,859.54, 89,520.53 and 40,981.55

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Solution

The fourth proportional to 64,859.54, 89,520.53 and 40,981.55 is: 56,563.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,859.54 : 89,520.53 = 40,981.55 : x
  2. Step 2: Convert to fraction form
    64,859.54/89,520.53 = 40,981.55/x
  3. Step 3: Cross multiply
    64,859.54x = 89,520.53 × 40,981.55
  4. Step 4: Simplify right side
    64,859.54x = 3,668,689,423.71
  5. Step 5: Solve for x
    x = 3,668,689,423.71/64,859.54
  6. Step 6: Final answer
    x = 56,563.61

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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.