Home / 101,129.76-139,558.94-55,807.72

Finding the Fourth Proportional to 101,129.76, 139,558.94 and 55,807.72

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Solution

The fourth proportional to 101,129.76, 139,558.94 and 55,807.72 is: 77,014.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,129.76 : 139,558.94 = 55,807.72 : x
  2. Step 2: Convert to fraction form
    101,129.76/139,558.94 = 55,807.72/x
  3. Step 3: Cross multiply
    101,129.76x = 139,558.94 × 55,807.72
  4. Step 4: Simplify right side
    101,129.76x = 7,788,466,247.02
  5. Step 5: Solve for x
    x = 7,788,466,247.02/101,129.76
  6. Step 6: Final answer
    x = 77,014.58

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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.