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Finding the Fourth Proportional to 125,520.40, 187,969.56 and 69,999.76

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Solution

The fourth proportional to 125,520.40, 187,969.56 and 69,999.76 is: 104,826.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,520.40 : 187,969.56 = 69,999.76 : x
  2. Step 2: Convert to fraction form
    125,520.40/187,969.56 = 69,999.76/x
  3. Step 3: Cross multiply
    125,520.40x = 187,969.56 × 69,999.76
  4. Step 4: Simplify right side
    125,520.40x = 13,157,824,087.31
  5. Step 5: Solve for x
    x = 13,157,824,087.31/125,520.40
  6. Step 6: Final answer
    x = 104,826.18

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1.5x scale

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.