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Finding the Fourth Proportional to 238,690.35, 357,958.98 and 78,730.38

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Solution

The fourth proportional to 238,690.35, 357,958.98 and 78,730.38 is: 118,070.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,690.35 : 357,958.98 = 78,730.38 : x
  2. Step 2: Convert to fraction form
    238,690.35/357,958.98 = 78,730.38/x
  3. Step 3: Cross multiply
    238,690.35x = 357,958.98 × 78,730.38
  4. Step 4: Simplify right side
    238,690.35x = 28,182,246,519.81
  5. Step 5: Solve for x
    x = 28,182,246,519.81/238,690.35
  6. Step 6: Final answer
    x = 118,070.32

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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.