Home / 191,610.40-287,415.60-66,935.20

Finding the Fourth Proportional to 191,610.40, 287,415.60 and 66,935.20

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Solution

The fourth proportional to 191,610.40, 287,415.60 and 66,935.20 is: 100,402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,610.40 : 287,415.60 = 66,935.20 : x
  2. Step 2: Convert to fraction form
    191,610.40/287,415.60 = 66,935.20/x
  3. Step 3: Cross multiply
    191,610.40x = 287,415.60 × 66,935.20
  4. Step 4: Simplify right side
    191,610.40x = 19,238,220,669.12
  5. Step 5: Solve for x
    x = 19,238,220,669.12/191,610.40
  6. Step 6: Final answer
    x = 100,402.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.