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Finding the Fourth Proportional to 290,739.50, 436,109.36 and 91,075.40

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Solution

The fourth proportional to 290,739.50, 436,109.36 and 91,075.40 is: 136,613.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,739.50 : 436,109.36 = 91,075.40 : x
  2. Step 2: Convert to fraction form
    290,739.50/436,109.36 = 91,075.40/x
  3. Step 3: Cross multiply
    290,739.50x = 436,109.36 × 91,075.40
  4. Step 4: Simplify right side
    290,739.50x = 39,718,835,723.71
  5. Step 5: Solve for x
    x = 39,718,835,723.71/290,739.50
  6. Step 6: Final answer
    x = 136,613.14

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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.