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Finding the Fourth Proportional to 111,058.40, 153,258.64 and 68,031.20

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Solution

The fourth proportional to 111,058.40, 153,258.64 and 68,031.20 is: 93,881.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,058.40 : 153,258.64 = 68,031.20 : x
  2. Step 2: Convert to fraction form
    111,058.40/153,258.64 = 68,031.20/x
  3. Step 3: Cross multiply
    111,058.40x = 153,258.64 × 68,031.20
  4. Step 4: Simplify right side
    111,058.40x = 10,426,369,189.57
  5. Step 5: Solve for x
    x = 10,426,369,189.57/111,058.40
  6. Step 6: Final answer
    x = 93,881.86

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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.