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Finding the Fourth Proportional to 156,378.99, 215,800.65 and 88,393.57

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Solution

The fourth proportional to 156,378.99, 215,800.65 and 88,393.57 is: 121,981.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,378.99 : 215,800.65 = 88,393.57 : x
  2. Step 2: Convert to fraction form
    156,378.99/215,800.65 = 88,393.57/x
  3. Step 3: Cross multiply
    156,378.99x = 215,800.65 × 88,393.57
  4. Step 4: Simplify right side
    156,378.99x = 19,075,389,861.82
  5. Step 5: Solve for x
    x = 19,075,389,861.82/156,378.99
  6. Step 6: Final answer
    x = 121,981.79

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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.