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Finding the Fourth Proportional to 476,643.50, 715,063.71 and 139,695.20

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Solution

The fourth proportional to 476,643.50, 715,063.71 and 139,695.20 is: 209,571.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,643.50 : 715,063.71 = 139,695.20 : x
  2. Step 2: Convert to fraction form
    476,643.50/715,063.71 = 139,695.20/x
  3. Step 3: Cross multiply
    476,643.50x = 715,063.71 × 139,695.20
  4. Step 4: Simplify right side
    476,643.50x = 99,890,967,981.19
  5. Step 5: Solve for x
    x = 99,890,967,981.19/476,643.50
  6. Step 6: Final answer
    x = 209,571.66

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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.