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Finding the Fourth Proportional to 209,782.80, 314,549.72 and 83,355.21

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Solution

The fourth proportional to 209,782.80, 314,549.72 and 83,355.21 is: 124,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,782.80 : 314,549.72 = 83,355.21 : x
  2. Step 2: Convert to fraction form
    209,782.80/314,549.72 = 83,355.21/x
  3. Step 3: Cross multiply
    209,782.80x = 314,549.72 × 83,355.21
  4. Step 4: Simplify right side
    209,782.80x = 26,219,357,966.04
  5. Step 5: Solve for x
    x = 26,219,357,966.04/209,782.80
  6. Step 6: Final answer
    x = 124,983.35

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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.