Home / 99,639.36-137,569.68-75,888.72

Finding the Fourth Proportional to 99,639.36, 137,569.68 and 75,888.72

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Solution

The fourth proportional to 99,639.36, 137,569.68 and 75,888.72 is: 104,777.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,639.36 : 137,569.68 = 75,888.72 : x
  2. Step 2: Convert to fraction form
    99,639.36/137,569.68 = 75,888.72/x
  3. Step 3: Cross multiply
    99,639.36x = 137,569.68 × 75,888.72
  4. Step 4: Simplify right side
    99,639.36x = 10,439,986,926.01
  5. Step 5: Solve for x
    x = 10,439,986,926.01/99,639.36
  6. Step 6: Final answer
    x = 104,777.74

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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.