Home / 405,045.20-607,653.91-138,734.21

Finding the Fourth Proportional to 405,045.20, 607,653.91 and 138,734.21

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Solution

The fourth proportional to 405,045.20, 607,653.91 and 138,734.21 is: 208,130.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,045.20 : 607,653.91 = 138,734.21 : x
  2. Step 2: Convert to fraction form
    405,045.20/607,653.91 = 138,734.21/x
  3. Step 3: Cross multiply
    405,045.20x = 607,653.91 × 138,734.21
  4. Step 4: Simplify right side
    405,045.20x = 84,302,385,157.26
  5. Step 5: Solve for x
    x = 84,302,385,157.26/405,045.20
  6. Step 6: Final answer
    x = 208,130.81

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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.