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Finding the Fourth Proportional to 78,874.76, 117,708.49 and 70,460.28

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Solution

The fourth proportional to 78,874.76, 117,708.49 and 70,460.28 is: 105,151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,874.76 : 117,708.49 = 70,460.28 : x
  2. Step 2: Convert to fraction form
    78,874.76/117,708.49 = 70,460.28/x
  3. Step 3: Cross multiply
    78,874.76x = 117,708.49 × 70,460.28
  4. Step 4: Simplify right side
    78,874.76x = 8,293,773,251.85
  5. Step 5: Solve for x
    x = 8,293,773,251.85/78,874.76
  6. Step 6: Final answer
    x = 105,151.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.