Home / 209,619.80-314,141.70-134,509.40

Finding the Fourth Proportional to 209,619.80, 314,141.70 and 134,509.40

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Solution

The fourth proportional to 209,619.80, 314,141.70 and 134,509.40 is: 201,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,619.80 : 314,141.70 = 134,509.40 : x
  2. Step 2: Convert to fraction form
    209,619.80/314,141.70 = 134,509.40/x
  3. Step 3: Cross multiply
    209,619.80x = 314,141.70 × 134,509.40
  4. Step 4: Simplify right side
    209,619.80x = 42,255,011,581.98
  5. Step 5: Solve for x
    x = 42,255,011,581.98/209,619.80
  6. Step 6: Final answer
    x = 201,579.30

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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.