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Finding the Fourth Proportional to 124,656.64, 172,058.24 and 70,972.16

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Solution

The fourth proportional to 124,656.64, 172,058.24 and 70,972.16 is: 97,959.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,656.64 : 172,058.24 = 70,972.16 : x
  2. Step 2: Convert to fraction form
    124,656.64/172,058.24 = 70,972.16/x
  3. Step 3: Cross multiply
    124,656.64x = 172,058.24 × 70,972.16
  4. Step 4: Simplify right side
    124,656.64x = 12,211,344,938.60
  5. Step 5: Solve for x
    x = 12,211,344,938.60/124,656.64
  6. Step 6: Final answer
    x = 97,959.84

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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.