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Finding the Fourth Proportional to 145,934.89, 201,389.76 and 78,866.89

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Solution

The fourth proportional to 145,934.89, 201,389.76 and 78,866.89 is: 108,836.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,934.89 : 201,389.76 = 78,866.89 : x
  2. Step 2: Convert to fraction form
    145,934.89/201,389.76 = 78,866.89/x
  3. Step 3: Cross multiply
    145,934.89x = 201,389.76 × 78,866.89
  4. Step 4: Simplify right side
    145,934.89x = 15,882,984,049.05
  5. Step 5: Solve for x
    x = 15,882,984,049.05/145,934.89
  6. Step 6: Final answer
    x = 108,836.10

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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.