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Finding the Fourth Proportional to 153,661.10, 212,066.30 and 93,247.11

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Solution

The fourth proportional to 153,661.10, 212,066.30 and 93,247.11 is: 128,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,661.10 : 212,066.30 = 93,247.11 : x
  2. Step 2: Convert to fraction form
    153,661.10/212,066.30 = 93,247.11/x
  3. Step 3: Cross multiply
    153,661.10x = 212,066.30 × 93,247.11
  4. Step 4: Simplify right side
    153,661.10x = 19,774,569,836.51
  5. Step 5: Solve for x
    x = 19,774,569,836.51/153,661.10
  6. Step 6: Final answer
    x = 128,689.50

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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.