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Finding the Fourth Proportional to 102,579.60, 153,869.40 and 83,917.20

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Solution

The fourth proportional to 102,579.60, 153,869.40 and 83,917.20 is: 125,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,579.60 : 153,869.40 = 83,917.20 : x
  2. Step 2: Convert to fraction form
    102,579.60/153,869.40 = 83,917.20/x
  3. Step 3: Cross multiply
    102,579.60x = 153,869.40 × 83,917.20
  4. Step 4: Simplify right side
    102,579.60x = 12,912,289,213.68
  5. Step 5: Solve for x
    x = 12,912,289,213.68/102,579.60
  6. Step 6: Final answer
    x = 125,875.80

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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.