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Finding the Fourth Proportional to 248,748, 373,122 and 90,890.40

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Solution

The fourth proportional to 248,748, 373,122 and 90,890.40 is: 136,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,748 : 373,122 = 90,890.40 : x
  2. Step 2: Convert to fraction form
    248,748/373,122 = 90,890.40/x
  3. Step 3: Cross multiply
    248,748x = 373,122 × 90,890.40
  4. Step 4: Simplify right side
    248,748x = 33,913,207,828.80
  5. Step 5: Solve for x
    x = 33,913,207,828.80/248,748
  6. Step 6: Final answer
    x = 136,335.60

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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.