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Finding the Fourth Proportional to 209,539.64, 314,278.74 and 69,300.28

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Solution

The fourth proportional to 209,539.64, 314,278.74 and 69,300.28 is: 103,940.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,539.64 : 314,278.74 = 69,300.28 : x
  2. Step 2: Convert to fraction form
    209,539.64/314,278.74 = 69,300.28/x
  3. Step 3: Cross multiply
    209,539.64x = 314,278.74 × 69,300.28
  4. Step 4: Simplify right side
    209,539.64x = 21,779,604,680.05
  5. Step 5: Solve for x
    x = 21,779,604,680.05/209,539.64
  6. Step 6: Final answer
    x = 103,940.26

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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.