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Finding the Fourth Proportional to 122,489.40, 183,734.10 and 60,281.40

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Solution

The fourth proportional to 122,489.40, 183,734.10 and 60,281.40 is: 90,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,489.40 : 183,734.10 = 60,281.40 : x
  2. Step 2: Convert to fraction form
    122,489.40/183,734.10 = 60,281.40/x
  3. Step 3: Cross multiply
    122,489.40x = 183,734.10 × 60,281.40
  4. Step 4: Simplify right side
    122,489.40x = 11,075,748,775.74
  5. Step 5: Solve for x
    x = 11,075,748,775.74/122,489.40
  6. Step 6: Final answer
    x = 90,422.10

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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.