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Finding the Fourth Proportional to 476,643.75, 715,064.09 and 139,695.45

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Solution

The fourth proportional to 476,643.75, 715,064.09 and 139,695.45 is: 209,572.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,643.75 : 715,064.09 = 139,695.45 : x
  2. Step 2: Convert to fraction form
    476,643.75/715,064.09 = 139,695.45/x
  3. Step 3: Cross multiply
    476,643.75x = 715,064.09 × 139,695.45
  4. Step 4: Simplify right side
    476,643.75x = 99,891,199,132.91
  5. Step 5: Solve for x
    x = 99,891,199,132.91/476,643.75
  6. Step 6: Final answer
    x = 209,572.03

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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.