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Finding the Fourth Proportional to 85,818.70, 118,436.80 and 47,590.22

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Solution

The fourth proportional to 85,818.70, 118,436.80 and 47,590.22 is: 65,678.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,818.70 : 118,436.80 = 47,590.22 : x
  2. Step 2: Convert to fraction form
    85,818.70/118,436.80 = 47,590.22/x
  3. Step 3: Cross multiply
    85,818.70x = 118,436.80 × 47,590.22
  4. Step 4: Simplify right side
    85,818.70x = 5,636,433,368.10
  5. Step 5: Solve for x
    x = 5,636,433,368.10/85,818.70
  6. Step 6: Final answer
    x = 65,678.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.