Home / 209,705.15-289,421.64-123,688.46

Finding the Fourth Proportional to 209,705.15, 289,421.64 and 123,688.46

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Solution

The fourth proportional to 209,705.15, 289,421.64 and 123,688.46 is: 170,706.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,705.15 : 289,421.64 = 123,688.46 : x
  2. Step 2: Convert to fraction form
    209,705.15/289,421.64 = 123,688.46/x
  3. Step 3: Cross multiply
    209,705.15x = 289,421.64 × 123,688.46
  4. Step 4: Simplify right side
    209,705.15x = 35,798,115,495.17
  5. Step 5: Solve for x
    x = 35,798,115,495.17/209,705.15
  6. Step 6: Final answer
    x = 170,706.90

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1.5x scale

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.