Home / 87,688.61-120,981.60-53,661.62

Finding the Fourth Proportional to 87,688.61, 120,981.60 and 53,661.62

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Solution

The fourth proportional to 87,688.61, 120,981.60 and 53,661.62 is: 74,035.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,688.61 : 120,981.60 = 53,661.62 : x
  2. Step 2: Convert to fraction form
    87,688.61/120,981.60 = 53,661.62/x
  3. Step 3: Cross multiply
    87,688.61x = 120,981.60 × 53,661.62
  4. Step 4: Simplify right side
    87,688.61x = 6,492,068,948.65
  5. Step 5: Solve for x
    x = 6,492,068,948.65/87,688.61
  6. Step 6: Final answer
    x = 74,035.49

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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.