Home / 86,639.64-129,886.56-42,243.54

Finding the Fourth Proportional to 86,639.64, 129,886.56 and 42,243.54

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Solution

The fourth proportional to 86,639.64, 129,886.56 and 42,243.54 is: 63,329.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,639.64 : 129,886.56 = 42,243.54 : x
  2. Step 2: Convert to fraction form
    86,639.64/129,886.56 = 42,243.54/x
  3. Step 3: Cross multiply
    86,639.64x = 129,886.56 × 42,243.54
  4. Step 4: Simplify right side
    86,639.64x = 5,486,868,092.82
  5. Step 5: Solve for x
    x = 5,486,868,092.82/86,639.64
  6. Step 6: Final answer
    x = 63,329.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.