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Finding the Fourth Proportional to 101,398.16, 139,783.08 and 69,516.56

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Solution

The fourth proportional to 101,398.16, 139,783.08 and 69,516.56 is: 95,832.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,398.16 : 139,783.08 = 69,516.56 : x
  2. Step 2: Convert to fraction form
    101,398.16/139,783.08 = 69,516.56/x
  3. Step 3: Cross multiply
    101,398.16x = 139,783.08 × 69,516.56
  4. Step 4: Simplify right side
    101,398.16x = 9,717,238,867.80
  5. Step 5: Solve for x
    x = 9,717,238,867.80/101,398.16
  6. Step 6: Final answer
    x = 95,832.50

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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.