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Finding the Fourth Proportional to 101,388.16, 139,769.28 and 69,506.56

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Solution

The fourth proportional to 101,388.16, 139,769.28 and 69,506.56 is: 95,818.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,388.16 : 139,769.28 = 69,506.56 : x
  2. Step 2: Convert to fraction form
    101,388.16/139,769.28 = 69,506.56/x
  3. Step 3: Cross multiply
    101,388.16x = 139,769.28 × 69,506.56
  4. Step 4: Simplify right side
    101,388.16x = 9,714,881,846.48
  5. Step 5: Solve for x
    x = 9,714,881,846.48/101,388.16
  6. Step 6: Final answer
    x = 95,818.70

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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.