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Finding the Fourth Proportional to 101,515.39, 140,089.54 and 56,192.40

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Solution

The fourth proportional to 101,515.39, 140,089.54 and 56,192.40 is: 77,544.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,515.39 : 140,089.54 = 56,192.40 : x
  2. Step 2: Convert to fraction form
    101,515.39/140,089.54 = 56,192.40/x
  3. Step 3: Cross multiply
    101,515.39x = 140,089.54 × 56,192.40
  4. Step 4: Simplify right side
    101,515.39x = 7,871,967,327.02
  5. Step 5: Solve for x
    x = 7,871,967,327.02/101,515.39
  6. Step 6: Final answer
    x = 77,544.57

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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.