Home / 103,638.20-155,457.30-66,313.40

Finding the Fourth Proportional to 103,638.20, 155,457.30 and 66,313.40

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Solution

The fourth proportional to 103,638.20, 155,457.30 and 66,313.40 is: 99,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.20 : 155,457.30 = 66,313.40 : x
  2. Step 2: Convert to fraction form
    103,638.20/155,457.30 = 66,313.40/x
  3. Step 3: Cross multiply
    103,638.20x = 155,457.30 × 66,313.40
  4. Step 4: Simplify right side
    103,638.20x = 10,308,902,117.82
  5. Step 5: Solve for x
    x = 10,308,902,117.82/103,638.20
  6. Step 6: Final answer
    x = 99,470.10

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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.