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Finding the Fourth Proportional to 102,666.60, 153,999.90 and 84,004.20

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Solution

The fourth proportional to 102,666.60, 153,999.90 and 84,004.20 is: 126,006.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,666.60 : 153,999.90 = 84,004.20 : x
  2. Step 2: Convert to fraction form
    102,666.60/153,999.90 = 84,004.20/x
  3. Step 3: Cross multiply
    102,666.60x = 153,999.90 × 84,004.20
  4. Step 4: Simplify right side
    102,666.60x = 12,936,638,399.58
  5. Step 5: Solve for x
    x = 12,936,638,399.58/102,666.60
  6. Step 6: Final answer
    x = 126,006.30

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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.