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Finding the Fourth Proportional to 142,365.60, 213,256.80 and 72,284.40

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Solution

The fourth proportional to 142,365.60, 213,256.80 and 72,284.40 is: 108,278.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,365.60 : 213,256.80 = 72,284.40 : x
  2. Step 2: Convert to fraction form
    142,365.60/213,256.80 = 72,284.40/x
  3. Step 3: Cross multiply
    142,365.60x = 213,256.80 × 72,284.40
  4. Step 4: Simplify right side
    142,365.60x = 15,415,139,833.92
  5. Step 5: Solve for x
    x = 15,415,139,833.92/142,365.60
  6. Step 6: Final answer
    x = 108,278.54

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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.