Home / 289,608,618.40-434,423,425.20-85,157,360.80

Finding the Fourth Proportional to 289,608,618.40, 434,423,425.20 and 85,157,360.80

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Solution

The fourth proportional to 289,608,618.40, 434,423,425.20 and 85,157,360.80 is: 127,739,127.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,608,618.40 : 434,423,425.20 = 85,157,360.80 : x
  2. Step 2: Convert to fraction form
    289,608,618.40/434,423,425.20 = 85,157,360.80/x
  3. Step 3: Cross multiply
    289,608,618.40x = 434,423,425.20 × 85,157,360.80
  4. Step 4: Simplify right side
    289,608,618.40x = 36,994,352,359,728,208
  5. Step 5: Solve for x
    x = 36,994,352,359,728,208/289,608,618.40
  6. Step 6: Final answer
    x = 127,739,127.94

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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.