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Finding the Fourth Proportional to 135,485.57, 186,980.65 and 75,061.80

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Solution

The fourth proportional to 135,485.57, 186,980.65 and 75,061.80 is: 103,591.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,485.57 : 186,980.65 = 75,061.80 : x
  2. Step 2: Convert to fraction form
    135,485.57/186,980.65 = 75,061.80/x
  3. Step 3: Cross multiply
    135,485.57x = 186,980.65 × 75,061.80
  4. Step 4: Simplify right side
    135,485.57x = 14,035,103,966.52
  5. Step 5: Solve for x
    x = 14,035,103,966.52/135,485.57
  6. Step 6: Final answer
    x = 103,591.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.