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Finding the Fourth Proportional to 353,123.40, 529,685.10 and 86,880.45

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Solution

The fourth proportional to 353,123.40, 529,685.10 and 86,880.45 is: 130,320.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,123.40 : 529,685.10 = 86,880.45 : x
  2. Step 2: Convert to fraction form
    353,123.40/529,685.10 = 86,880.45/x
  3. Step 3: Cross multiply
    353,123.40x = 529,685.10 × 86,880.45
  4. Step 4: Simplify right side
    353,123.40x = 46,019,279,846.30
  5. Step 5: Solve for x
    x = 46,019,279,846.30/353,123.40
  6. Step 6: Final answer
    x = 130,320.68

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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.