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Finding the Fourth Proportional to 112,666.38, 155,313.96 and 85,762.02

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Solution

The fourth proportional to 112,666.38, 155,313.96 and 85,762.02 is: 118,225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,666.38 : 155,313.96 = 85,762.02 : x
  2. Step 2: Convert to fraction form
    112,666.38/155,313.96 = 85,762.02/x
  3. Step 3: Cross multiply
    112,666.38x = 155,313.96 × 85,762.02
  4. Step 4: Simplify right side
    112,666.38x = 13,320,038,943.80
  5. Step 5: Solve for x
    x = 13,320,038,943.80/112,666.38
  6. Step 6: Final answer
    x = 118,225.50

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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.