Home / 105,629.16-145,769.70-57,881.64

Finding the Fourth Proportional to 105,629.16, 145,769.70 and 57,881.64

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Solution

The fourth proportional to 105,629.16, 145,769.70 and 57,881.64 is: 79,877.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,629.16 : 145,769.70 = 57,881.64 : x
  2. Step 2: Convert to fraction form
    105,629.16/145,769.70 = 57,881.64/x
  3. Step 3: Cross multiply
    105,629.16x = 145,769.70 × 57,881.64
  4. Step 4: Simplify right side
    105,629.16x = 8,437,389,298.31
  5. Step 5: Solve for x
    x = 8,437,389,298.31/105,629.16
  6. Step 6: Final answer
    x = 79,877.46

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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.