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Finding the Fourth Proportional to 102,807.76, 141,940.04 and 78,889.04

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Solution

The fourth proportional to 102,807.76, 141,940.04 and 78,889.04 is: 108,917.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,807.76 : 141,940.04 = 78,889.04 : x
  2. Step 2: Convert to fraction form
    102,807.76/141,940.04 = 78,889.04/x
  3. Step 3: Cross multiply
    102,807.76x = 141,940.04 × 78,889.04
  4. Step 4: Simplify right side
    102,807.76x = 11,197,513,493.16
  5. Step 5: Solve for x
    x = 11,197,513,493.16/102,807.76
  6. Step 6: Final answer
    x = 108,917.01

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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.