Home / 90,918.65-136,314.60-40,290.11

Finding the Fourth Proportional to 90,918.65, 136,314.60 and 40,290.11

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Solution

The fourth proportional to 90,918.65, 136,314.60 and 40,290.11 is: 60,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,918.65 : 136,314.60 = 40,290.11 : x
  2. Step 2: Convert to fraction form
    90,918.65/136,314.60 = 40,290.11/x
  3. Step 3: Cross multiply
    90,918.65x = 136,314.60 × 40,290.11
  4. Step 4: Simplify right side
    90,918.65x = 5,492,129,907.12
  5. Step 5: Solve for x
    x = 5,492,129,907.12/90,918.65
  6. Step 6: Final answer
    x = 60,407.08

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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.