Home / 105,741.40-145,930.80-69,869.20

Finding the Fourth Proportional to 105,741.40, 145,930.80 and 69,869.20

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Solution

The fourth proportional to 105,741.40, 145,930.80 and 69,869.20 is: 96,424.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,741.40 : 145,930.80 = 69,869.20 : x
  2. Step 2: Convert to fraction form
    105,741.40/145,930.80 = 69,869.20/x
  3. Step 3: Cross multiply
    105,741.40x = 145,930.80 × 69,869.20
  4. Step 4: Simplify right side
    105,741.40x = 10,196,068,251.36
  5. Step 5: Solve for x
    x = 10,196,068,251.36/105,741.40
  6. Step 6: Final answer
    x = 96,424.56

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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.