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Finding the Fourth Proportional to 342,443.60, 513,720.12 and 105,730.64

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Solution

The fourth proportional to 342,443.60, 513,720.12 and 105,730.64 is: 158,612.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,443.60 : 513,720.12 = 105,730.64 : x
  2. Step 2: Convert to fraction form
    342,443.60/513,720.12 = 105,730.64/x
  3. Step 3: Cross multiply
    342,443.60x = 513,720.12 × 105,730.64
  4. Step 4: Simplify right side
    342,443.60x = 54,315,957,068.48
  5. Step 5: Solve for x
    x = 54,315,957,068.48/342,443.60
  6. Step 6: Final answer
    x = 158,612.85

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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.