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Finding the Fourth Proportional to 66,448.60, 99,701.70 and 31,370.20

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Solution

The fourth proportional to 66,448.60, 99,701.70 and 31,370.20 is: 47,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,448.60 : 99,701.70 = 31,370.20 : x
  2. Step 2: Convert to fraction form
    66,448.60/99,701.70 = 31,370.20/x
  3. Step 3: Cross multiply
    66,448.60x = 99,701.70 × 31,370.20
  4. Step 4: Simplify right side
    66,448.60x = 3,127,662,269.34
  5. Step 5: Solve for x
    x = 3,127,662,269.34/66,448.60
  6. Step 6: Final answer
    x = 47,068.90

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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.