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Finding the Fourth Proportional to 103,940.56, 143,503.56 and 72,098.32

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Solution

The fourth proportional to 103,940.56, 143,503.56 and 72,098.32 is: 99,541.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,940.56 : 143,503.56 = 72,098.32 : x
  2. Step 2: Convert to fraction form
    103,940.56/143,503.56 = 72,098.32/x
  3. Step 3: Cross multiply
    103,940.56x = 143,503.56 × 72,098.32
  4. Step 4: Simplify right side
    103,940.56x = 10,346,365,590.02
  5. Step 5: Solve for x
    x = 10,346,365,590.02/103,940.56
  6. Step 6: Final answer
    x = 99,541.18

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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.