Home / 85,528.05-128,312.94-60,276.80

Finding the Fourth Proportional to 85,528.05, 128,312.94 and 60,276.80

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Solution

The fourth proportional to 85,528.05, 128,312.94 and 60,276.80 is: 90,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,528.05 : 128,312.94 = 60,276.80 : x
  2. Step 2: Convert to fraction form
    85,528.05/128,312.94 = 60,276.80/x
  3. Step 3: Cross multiply
    85,528.05x = 128,312.94 × 60,276.80
  4. Step 4: Simplify right side
    85,528.05x = 7,734,292,780.23
  5. Step 5: Solve for x
    x = 7,734,292,780.23/85,528.05
  6. Step 6: Final answer
    x = 90,429.90

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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.