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Finding the Fourth Proportional to 131,390.64, 197,026.56 and 61,290

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Solution

The fourth proportional to 131,390.64, 197,026.56 and 61,290 is: 91,907.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,390.64 : 197,026.56 = 61,290 : x
  2. Step 2: Convert to fraction form
    131,390.64/197,026.56 = 61,290/x
  3. Step 3: Cross multiply
    131,390.64x = 197,026.56 × 61,290
  4. Step 4: Simplify right side
    131,390.64x = 12,075,757,862.40
  5. Step 5: Solve for x
    x = 12,075,757,862.40/131,390.64
  6. Step 6: Final answer
    x = 91,907.29

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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.