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Finding the Fourth Proportional to 109,595.20, 164,457.60 and 79,938.40

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Solution

The fourth proportional to 109,595.20, 164,457.60 and 79,938.40 is: 119,954.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,595.20 : 164,457.60 = 79,938.40 : x
  2. Step 2: Convert to fraction form
    109,595.20/164,457.60 = 79,938.40/x
  3. Step 3: Cross multiply
    109,595.20x = 164,457.60 × 79,938.40
  4. Step 4: Simplify right side
    109,595.20x = 13,146,477,411.84
  5. Step 5: Solve for x
    x = 13,146,477,411.84/109,595.20
  6. Step 6: Final answer
    x = 119,954.86

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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.