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Finding the Fourth Proportional to 86,907.30, 130,130.55 and 68,475.30

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Solution

The fourth proportional to 86,907.30, 130,130.55 and 68,475.30 is: 102,531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.30 : 130,130.55 = 68,475.30 : x
  2. Step 2: Convert to fraction form
    86,907.30/130,130.55 = 68,475.30/x
  3. Step 3: Cross multiply
    86,907.30x = 130,130.55 × 68,475.30
  4. Step 4: Simplify right side
    86,907.30x = 8,910,728,450.42
  5. Step 5: Solve for x
    x = 8,910,728,450.42/86,907.30
  6. Step 6: Final answer
    x = 102,531.42

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1.5x scale

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.