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Finding the Fourth Proportional to 105,662.79, 145,815.66 and 57,917.07

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Solution

The fourth proportional to 105,662.79, 145,815.66 and 57,917.07 is: 79,926.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,662.79 : 145,815.66 = 57,917.07 : x
  2. Step 2: Convert to fraction form
    105,662.79/145,815.66 = 57,917.07/x
  3. Step 3: Cross multiply
    105,662.79x = 145,815.66 × 57,917.07
  4. Step 4: Simplify right side
    105,662.79x = 8,445,215,787.32
  5. Step 5: Solve for x
    x = 8,445,215,787.32/105,662.79
  6. Step 6: Final answer
    x = 79,926.11

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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.