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Finding the Fourth Proportional to 353,157.35, 530,068.93 and 128,734.70

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Solution

The fourth proportional to 353,157.35, 530,068.93 and 128,734.70 is: 193,223.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,157.35 : 530,068.93 = 128,734.70 : x
  2. Step 2: Convert to fraction form
    353,157.35/530,068.93 = 128,734.70/x
  3. Step 3: Cross multiply
    353,157.35x = 530,068.93 × 128,734.70
  4. Step 4: Simplify right side
    353,157.35x = 68,238,264,682.87
  5. Step 5: Solve for x
    x = 68,238,264,682.87/353,157.35
  6. Step 6: Final answer
    x = 193,223.40

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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.