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Finding the Fourth Proportional to 56,709.84, 78,258.28 and 30,867.60

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Solution

The fourth proportional to 56,709.84, 78,258.28 and 30,867.60 is: 42,596.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,709.84 : 78,258.28 = 30,867.60 : x
  2. Step 2: Convert to fraction form
    56,709.84/78,258.28 = 30,867.60/x
  3. Step 3: Cross multiply
    56,709.84x = 78,258.28 × 30,867.60
  4. Step 4: Simplify right side
    56,709.84x = 2,415,645,283.73
  5. Step 5: Solve for x
    x = 2,415,645,283.73/56,709.84
  6. Step 6: Final answer
    x = 42,596.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.