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Finding the Fourth Proportional to 78,298.80, 117,423.60 and 25,696.32

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Solution

The fourth proportional to 78,298.80, 117,423.60 and 25,696.32 is: 38,536.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,298.80 : 117,423.60 = 25,696.32 : x
  2. Step 2: Convert to fraction form
    78,298.80/117,423.60 = 25,696.32/x
  3. Step 3: Cross multiply
    78,298.80x = 117,423.60 × 25,696.32
  4. Step 4: Simplify right side
    78,298.80x = 3,017,354,401.15
  5. Step 5: Solve for x
    x = 3,017,354,401.15/78,298.80
  6. Step 6: Final answer
    x = 38,536.41

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1.5x scale

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.