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Finding the Fourth Proportional to 100,507.19, 138,690.11 and 58,064.81

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Solution

The fourth proportional to 100,507.19, 138,690.11 and 58,064.81 is: 80,123.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,507.19 : 138,690.11 = 58,064.81 : x
  2. Step 2: Convert to fraction form
    100,507.19/138,690.11 = 58,064.81/x
  3. Step 3: Cross multiply
    100,507.19x = 138,690.11 × 58,064.81
  4. Step 4: Simplify right side
    100,507.19x = 8,053,014,595.71
  5. Step 5: Solve for x
    x = 8,053,014,595.71/100,507.19
  6. Step 6: Final answer
    x = 80,123.77

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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.