Home / 289,719.18-434,702.70-121,278.87

Finding the Fourth Proportional to 289,719.18, 434,702.70 and 121,278.87

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Solution

The fourth proportional to 289,719.18, 434,702.70 and 121,278.87 is: 181,970.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,719.18 : 434,702.70 = 121,278.87 : x
  2. Step 2: Convert to fraction form
    289,719.18/434,702.70 = 121,278.87/x
  3. Step 3: Cross multiply
    289,719.18x = 434,702.70 × 121,278.87
  4. Step 4: Simplify right side
    289,719.18x = 52,720,252,241.95
  5. Step 5: Solve for x
    x = 52,720,252,241.95/289,719.18
  6. Step 6: Final answer
    x = 181,970.18

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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.