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Finding the Fourth Proportional to 145,891.50, 201,330.30 and 78,823.50

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Solution

The fourth proportional to 145,891.50, 201,330.30 and 78,823.50 is: 108,776.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,891.50 : 201,330.30 = 78,823.50 : x
  2. Step 2: Convert to fraction form
    145,891.50/201,330.30 = 78,823.50/x
  3. Step 3: Cross multiply
    145,891.50x = 201,330.30 × 78,823.50
  4. Step 4: Simplify right side
    145,891.50x = 15,869,558,902.05
  5. Step 5: Solve for x
    x = 15,869,558,902.05/145,891.50
  6. Step 6: Final answer
    x = 108,776.45

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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.