Home / 209,643.22-289,312.40-118,990.70

Finding the Fourth Proportional to 209,643.22, 289,312.40 and 118,990.70

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Solution

The fourth proportional to 209,643.22, 289,312.40 and 118,990.70 is: 164,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,643.22 : 289,312.40 = 118,990.70 : x
  2. Step 2: Convert to fraction form
    209,643.22/289,312.40 = 118,990.70/x
  3. Step 3: Cross multiply
    209,643.22x = 289,312.40 × 118,990.70
  4. Step 4: Simplify right side
    209,643.22x = 34,425,484,994.68
  5. Step 5: Solve for x
    x = 34,425,484,994.68/209,643.22
  6. Step 6: Final answer
    x = 164,209.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.