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Finding the Fourth Proportional to 105,313.40, 157,970.10 and 79,069.40

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Solution

The fourth proportional to 105,313.40, 157,970.10 and 79,069.40 is: 118,604.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,313.40 : 157,970.10 = 79,069.40 : x
  2. Step 2: Convert to fraction form
    105,313.40/157,970.10 = 79,069.40/x
  3. Step 3: Cross multiply
    105,313.40x = 157,970.10 × 79,069.40
  4. Step 4: Simplify right side
    105,313.40x = 12,490,601,024.94
  5. Step 5: Solve for x
    x = 12,490,601,024.94/105,313.40
  6. Step 6: Final answer
    x = 118,604.10

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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.