Home / 209,430.29-289,114.18-128,926.82

Finding the Fourth Proportional to 209,430.29, 289,114.18 and 128,926.82

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Solution

The fourth proportional to 209,430.29, 289,114.18 and 128,926.82 is: 177,980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,430.29 : 289,114.18 = 128,926.82 : x
  2. Step 2: Convert to fraction form
    209,430.29/289,114.18 = 128,926.82/x
  3. Step 3: Cross multiply
    209,430.29x = 289,114.18 × 128,926.82
  4. Step 4: Simplify right side
    209,430.29x = 37,274,572,035.99
  5. Step 5: Solve for x
    x = 37,274,572,035.99/209,430.29
  6. Step 6: Final answer
    x = 177,980.81

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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.