Home / 100,032.30-138,039.48-54,701.50

Finding the Fourth Proportional to 100,032.30, 138,039.48 and 54,701.50

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Solution

The fourth proportional to 100,032.30, 138,039.48 and 54,701.50 is: 75,485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,032.30 : 138,039.48 = 54,701.50 : x
  2. Step 2: Convert to fraction form
    100,032.30/138,039.48 = 54,701.50/x
  3. Step 3: Cross multiply
    100,032.30x = 138,039.48 × 54,701.50
  4. Step 4: Simplify right side
    100,032.30x = 7,550,966,615.22
  5. Step 5: Solve for x
    x = 7,550,966,615.22/100,032.30
  6. Step 6: Final answer
    x = 75,485.28

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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.