Home / 90,014.40-135,021.60-72,518.40

Finding the Fourth Proportional to 90,014.40, 135,021.60 and 72,518.40

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Solution

The fourth proportional to 90,014.40, 135,021.60 and 72,518.40 is: 108,777.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,014.40 : 135,021.60 = 72,518.40 : x
  2. Step 2: Convert to fraction form
    90,014.40/135,021.60 = 72,518.40/x
  3. Step 3: Cross multiply
    90,014.40x = 135,021.60 × 72,518.40
  4. Step 4: Simplify right side
    90,014.40x = 9,791,550,397.44
  5. Step 5: Solve for x
    x = 9,791,550,397.44/90,014.40
  6. Step 6: Final answer
    x = 108,777.60

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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.