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Finding the Fourth Proportional to 84,312.80, 126,476.40 and 28,908.80

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Solution

The fourth proportional to 84,312.80, 126,476.40 and 28,908.80 is: 43,365.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,312.80 : 126,476.40 = 28,908.80 : x
  2. Step 2: Convert to fraction form
    84,312.80/126,476.40 = 28,908.80/x
  3. Step 3: Cross multiply
    84,312.80x = 126,476.40 × 28,908.80
  4. Step 4: Simplify right side
    84,312.80x = 3,656,280,952.32
  5. Step 5: Solve for x
    x = 3,656,280,952.32/84,312.80
  6. Step 6: Final answer
    x = 43,365.67

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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.