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Finding the Fourth Proportional to 100,368.28, 138,508.23 and 55,656.28

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Solution

The fourth proportional to 100,368.28, 138,508.23 and 55,656.28 is: 76,805.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,368.28 : 138,508.23 = 55,656.28 : x
  2. Step 2: Convert to fraction form
    100,368.28/138,508.23 = 55,656.28/x
  3. Step 3: Cross multiply
    100,368.28x = 138,508.23 × 55,656.28
  4. Step 4: Simplify right side
    100,368.28x = 7,708,852,899.96
  5. Step 5: Solve for x
    x = 7,708,852,899.96/100,368.28
  6. Step 6: Final answer
    x = 76,805.67

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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.