Home / 100,296.08-138,471.60-64,548.34

Finding the Fourth Proportional to 100,296.08, 138,471.60 and 64,548.34

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Solution

The fourth proportional to 100,296.08, 138,471.60 and 64,548.34 is: 89,117.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,296.08 : 138,471.60 = 64,548.34 : x
  2. Step 2: Convert to fraction form
    100,296.08/138,471.60 = 64,548.34/x
  3. Step 3: Cross multiply
    100,296.08x = 138,471.60 × 64,548.34
  4. Step 4: Simplify right side
    100,296.08x = 8,938,111,917.14
  5. Step 5: Solve for x
    x = 8,938,111,917.14/100,296.08
  6. Step 6: Final answer
    x = 89,117.26

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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.