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Finding the Fourth Proportional to 111,415.77, 153,753.84 and 60,428.51

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Solution

The fourth proportional to 111,415.77, 153,753.84 and 60,428.51 is: 83,391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,415.77 : 153,753.84 = 60,428.51 : x
  2. Step 2: Convert to fraction form
    111,415.77/153,753.84 = 60,428.51/x
  3. Step 3: Cross multiply
    111,415.77x = 153,753.84 × 60,428.51
  4. Step 4: Simplify right side
    111,415.77x = 9,291,114,689.21
  5. Step 5: Solve for x
    x = 9,291,114,689.21/111,415.77
  6. Step 6: Final answer
    x = 83,391.38

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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.