Home / 101,429.12-139,972.08-56,717.12

Finding the Fourth Proportional to 101,429.12, 139,972.08 and 56,717.12

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Solution

The fourth proportional to 101,429.12, 139,972.08 and 56,717.12 is: 78,269.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,429.12 : 139,972.08 = 56,717.12 : x
  2. Step 2: Convert to fraction form
    101,429.12/139,972.08 = 56,717.12/x
  3. Step 3: Cross multiply
    101,429.12x = 139,972.08 × 56,717.12
  4. Step 4: Simplify right side
    101,429.12x = 7,938,813,258.01
  5. Step 5: Solve for x
    x = 7,938,813,258.01/101,429.12
  6. Step 6: Final answer
    x = 78,269.57

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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.