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Finding the Fourth Proportional to 78,960.15, 118,459.71 and 55,632.15

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Solution

The fourth proportional to 78,960.15, 118,459.71 and 55,632.15 is: 83,461.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,960.15 : 118,459.71 = 55,632.15 : x
  2. Step 2: Convert to fraction form
    78,960.15/118,459.71 = 55,632.15/x
  3. Step 3: Cross multiply
    78,960.15x = 118,459.71 × 55,632.15
  4. Step 4: Simplify right side
    78,960.15x = 6,590,168,355.68
  5. Step 5: Solve for x
    x = 6,590,168,355.68/78,960.15
  6. Step 6: Final answer
    x = 83,461.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.