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Finding the Fourth Proportional to 301,211.40, 451,881.90 and 90,870.60

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Solution

The fourth proportional to 301,211.40, 451,881.90 and 90,870.60 is: 136,325.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    301,211.40 : 451,881.90 = 90,870.60 : x
  2. Step 2: Convert to fraction form
    301,211.40/451,881.90 = 90,870.60/x
  3. Step 3: Cross multiply
    301,211.40x = 451,881.90 × 90,870.60
  4. Step 4: Simplify right side
    301,211.40x = 41,062,779,382.14
  5. Step 5: Solve for x
    x = 41,062,779,382.14/301,211.40
  6. Step 6: Final answer
    x = 136,325.45

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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.