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Finding the Fourth Proportional to 190,510.61, 285,897.13 and 65,851.61

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Solution

The fourth proportional to 190,510.61, 285,897.13 and 65,851.61 is: 98,822.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,510.61 : 285,897.13 = 65,851.61 : x
  2. Step 2: Convert to fraction form
    190,510.61/285,897.13 = 65,851.61/x
  3. Step 3: Cross multiply
    190,510.61x = 285,897.13 × 65,851.61
  4. Step 4: Simplify right side
    190,510.61x = 18,826,784,710.76
  5. Step 5: Solve for x
    x = 18,826,784,710.76/190,510.61
  6. Step 6: Final answer
    x = 98,822.76

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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.