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Finding the Fourth Proportional to 93,378.60, 128,873.21 and 51,989.76

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Solution

The fourth proportional to 93,378.60, 128,873.21 and 51,989.76 is: 71,751.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,378.60 : 128,873.21 = 51,989.76 : x
  2. Step 2: Convert to fraction form
    93,378.60/128,873.21 = 51,989.76/x
  3. Step 3: Cross multiply
    93,378.60x = 128,873.21 × 51,989.76
  4. Step 4: Simplify right side
    93,378.60x = 6,700,087,258.33
  5. Step 5: Solve for x
    x = 6,700,087,258.33/93,378.60
  6. Step 6: Final answer
    x = 71,751.85

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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.