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Finding the Fourth Proportional to 93,381.80, 128,908.63 and 63,258.61

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Solution

The fourth proportional to 93,381.80, 128,908.63 and 63,258.61 is: 87,325.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,381.80 : 128,908.63 = 63,258.61 : x
  2. Step 2: Convert to fraction form
    93,381.80/128,908.63 = 63,258.61/x
  3. Step 3: Cross multiply
    93,381.80x = 128,908.63 × 63,258.61
  4. Step 4: Simplify right side
    93,381.80x = 8,154,580,750.80
  5. Step 5: Solve for x
    x = 8,154,580,750.80/93,381.80
  6. Step 6: Final answer
    x = 87,325.16

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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.