Home / 78,140.61-117,210.04-18,976.25

Finding the Fourth Proportional to 78,140.61, 117,210.04 and 18,976.25

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Solution

The fourth proportional to 78,140.61, 117,210.04 and 18,976.25 is: 28,464.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.61 : 117,210.04 = 18,976.25 : x
  2. Step 2: Convert to fraction form
    78,140.61/117,210.04 = 18,976.25/x
  3. Step 3: Cross multiply
    78,140.61x = 117,210.04 × 18,976.25
  4. Step 4: Simplify right side
    78,140.61x = 2,224,207,267.13
  5. Step 5: Solve for x
    x = 2,224,207,267.13/78,140.61
  6. Step 6: Final answer
    x = 28,464.17

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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.