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Finding the Fourth Proportional to 90,924, 125,492.40 and 51,180

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Solution

The fourth proportional to 90,924, 125,492.40 and 51,180 is: 70,638.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,924 : 125,492.40 = 51,180 : x
  2. Step 2: Convert to fraction form
    90,924/125,492.40 = 51,180/x
  3. Step 3: Cross multiply
    90,924x = 125,492.40 × 51,180
  4. Step 4: Simplify right side
    90,924x = 6,422,701,032
  5. Step 5: Solve for x
    x = 6,422,701,032/90,924
  6. Step 6: Final answer
    x = 70,638.13

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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.