Home / 85,764.80-128,666.10-28,836.76

Finding the Fourth Proportional to 85,764.80, 128,666.10 and 28,836.76

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Solution

The fourth proportional to 85,764.80, 128,666.10 and 28,836.76 is: 43,261.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,764.80 : 128,666.10 = 28,836.76 : x
  2. Step 2: Convert to fraction form
    85,764.80/128,666.10 = 28,836.76/x
  3. Step 3: Cross multiply
    85,764.80x = 128,666.10 × 28,836.76
  4. Step 4: Simplify right side
    85,764.80x = 3,710,313,445.84
  5. Step 5: Solve for x
    x = 3,710,313,445.84/85,764.80
  6. Step 6: Final answer
    x = 43,261.49

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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.