Home / 101,099.79-139,516.83-55,778.18

Finding the Fourth Proportional to 101,099.79, 139,516.83 and 55,778.18

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Solution

The fourth proportional to 101,099.79, 139,516.83 and 55,778.18 is: 76,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,099.79 : 139,516.83 = 55,778.18 : x
  2. Step 2: Convert to fraction form
    101,099.79/139,516.83 = 55,778.18/x
  3. Step 3: Cross multiply
    101,099.79x = 139,516.83 × 55,778.18
  4. Step 4: Simplify right side
    101,099.79x = 7,781,994,159.19
  5. Step 5: Solve for x
    x = 7,781,994,159.19/101,099.79
  6. Step 6: Final answer
    x = 76,973.40

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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.