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Finding the Fourth Proportional to 137,745.72, 190,059.48 and 90,069.12

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Solution

The fourth proportional to 137,745.72, 190,059.48 and 90,069.12 is: 124,276.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,745.72 : 190,059.48 = 90,069.12 : x
  2. Step 2: Convert to fraction form
    137,745.72/190,059.48 = 90,069.12/x
  3. Step 3: Cross multiply
    137,745.72x = 190,059.48 × 90,069.12
  4. Step 4: Simplify right side
    137,745.72x = 17,118,490,111.26
  5. Step 5: Solve for x
    x = 17,118,490,111.26/137,745.72
  6. Step 6: Final answer
    x = 124,276.02

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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.