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Finding the Fourth Proportional to 100,349.16, 138,483.36 and 55,031.28

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Solution

The fourth proportional to 100,349.16, 138,483.36 and 55,031.28 is: 75,944.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,349.16 : 138,483.36 = 55,031.28 : x
  2. Step 2: Convert to fraction form
    100,349.16/138,483.36 = 55,031.28/x
  3. Step 3: Cross multiply
    100,349.16x = 138,483.36 × 55,031.28
  4. Step 4: Simplify right side
    100,349.16x = 7,620,916,559.50
  5. Step 5: Solve for x
    x = 7,620,916,559.50/100,349.16
  6. Step 6: Final answer
    x = 75,944.00

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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.