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Finding the Fourth Proportional to 84,666.40, 126,999.60 and 76,501.60

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Solution

The fourth proportional to 84,666.40, 126,999.60 and 76,501.60 is: 114,752.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,666.40 : 126,999.60 = 76,501.60 : x
  2. Step 2: Convert to fraction form
    84,666.40/126,999.60 = 76,501.60/x
  3. Step 3: Cross multiply
    84,666.40x = 126,999.60 × 76,501.60
  4. Step 4: Simplify right side
    84,666.40x = 9,715,672,599.36
  5. Step 5: Solve for x
    x = 9,715,672,599.36/84,666.40
  6. Step 6: Final answer
    x = 114,752.40

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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.