Home / 209,509.12-314,312.88-69,267.76

Finding the Fourth Proportional to 209,509.12, 314,312.88 and 69,267.76

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Solution

The fourth proportional to 209,509.12, 314,312.88 and 69,267.76 is: 103,917.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,509.12 : 314,312.88 = 69,267.76 : x
  2. Step 2: Convert to fraction form
    209,509.12/314,312.88 = 69,267.76/x
  3. Step 3: Cross multiply
    209,509.12x = 314,312.88 × 69,267.76
  4. Step 4: Simplify right side
    209,509.12x = 21,771,749,136.75
  5. Step 5: Solve for x
    x = 21,771,749,136.75/209,509.12
  6. Step 6: Final answer
    x = 103,917.91

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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.