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Finding the Fourth Proportional to 142,646.60, 213,969.90 and 72,662.60

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Solution

The fourth proportional to 142,646.60, 213,969.90 and 72,662.60 is: 108,993.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,646.60 : 213,969.90 = 72,662.60 : x
  2. Step 2: Convert to fraction form
    142,646.60/213,969.90 = 72,662.60/x
  3. Step 3: Cross multiply
    142,646.60x = 213,969.90 × 72,662.60
  4. Step 4: Simplify right side
    142,646.60x = 15,547,609,255.74
  5. Step 5: Solve for x
    x = 15,547,609,255.74/142,646.60
  6. Step 6: Final answer
    x = 108,993.90

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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.