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Finding the Fourth Proportional to 70,363.68, 105,519.96 and 20,430.24

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Solution

The fourth proportional to 70,363.68, 105,519.96 and 20,430.24 is: 30,637.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,363.68 : 105,519.96 = 20,430.24 : x
  2. Step 2: Convert to fraction form
    70,363.68/105,519.96 = 20,430.24/x
  3. Step 3: Cross multiply
    70,363.68x = 105,519.96 × 20,430.24
  4. Step 4: Simplify right side
    70,363.68x = 2,155,798,107.59
  5. Step 5: Solve for x
    x = 2,155,798,107.59/70,363.68
  6. Step 6: Final answer
    x = 30,637.94

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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.