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Finding the Fourth Proportional to 100,652.69, 138,902.47 and 55,332.58

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Solution

The fourth proportional to 100,652.69, 138,902.47 and 55,332.58 is: 76,359.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,652.69 : 138,902.47 = 55,332.58 : x
  2. Step 2: Convert to fraction form
    100,652.69/138,902.47 = 55,332.58/x
  3. Step 3: Cross multiply
    100,652.69x = 138,902.47 × 55,332.58
  4. Step 4: Simplify right side
    100,652.69x = 7,685,831,756.81
  5. Step 5: Solve for x
    x = 7,685,831,756.81/100,652.69
  6. Step 6: Final answer
    x = 76,359.93

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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.