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Finding the Fourth Proportional to 92,859.90, 139,095.45 and 51,258.30

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Solution

The fourth proportional to 92,859.90, 139,095.45 and 51,258.30 is: 76,780.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,859.90 : 139,095.45 = 51,258.30 : x
  2. Step 2: Convert to fraction form
    92,859.90/139,095.45 = 51,258.30/x
  3. Step 3: Cross multiply
    92,859.90x = 139,095.45 × 51,258.30
  4. Step 4: Simplify right side
    92,859.90x = 7,129,796,304.74
  5. Step 5: Solve for x
    x = 7,129,796,304.74/92,859.90
  6. Step 6: Final answer
    x = 76,780.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.