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Finding the Fourth Proportional to 228,068.10, 342,175.05 and 78,404.40

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Solution

The fourth proportional to 228,068.10, 342,175.05 and 78,404.40 is: 117,631.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,068.10 : 342,175.05 = 78,404.40 : x
  2. Step 2: Convert to fraction form
    228,068.10/342,175.05 = 78,404.40/x
  3. Step 3: Cross multiply
    228,068.10x = 342,175.05 × 78,404.40
  4. Step 4: Simplify right side
    228,068.10x = 26,828,029,490.22
  5. Step 5: Solve for x
    x = 26,828,029,490.22/228,068.10
  6. Step 6: Final answer
    x = 117,631.66

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1.5x scale

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.