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Finding the Fourth Proportional to 84,853.84, 126,660.44 and 78,686.32

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Solution

The fourth proportional to 84,853.84, 126,660.44 and 78,686.32 is: 117,454.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,853.84 : 126,660.44 = 78,686.32 : x
  2. Step 2: Convert to fraction form
    84,853.84/126,660.44 = 78,686.32/x
  3. Step 3: Cross multiply
    84,853.84x = 126,660.44 × 78,686.32
  4. Step 4: Simplify right side
    84,853.84x = 9,966,443,913.18
  5. Step 5: Solve for x
    x = 9,966,443,913.18/84,853.84
  6. Step 6: Final answer
    x = 117,454.25

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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.