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Finding the Fourth Proportional to 72,116.98, 100,030.61 and 70,198.90

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Solution

The fourth proportional to 72,116.98, 100,030.61 and 70,198.90 is: 97,370.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,116.98 : 100,030.61 = 70,198.90 : x
  2. Step 2: Convert to fraction form
    72,116.98/100,030.61 = 70,198.90/x
  3. Step 3: Cross multiply
    72,116.98x = 100,030.61 × 70,198.90
  4. Step 4: Simplify right side
    72,116.98x = 7,022,038,788.33
  5. Step 5: Solve for x
    x = 7,022,038,788.33/72,116.98
  6. Step 6: Final answer
    x = 97,370.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.