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Finding the Fourth Proportional to 99,289.80, 148,934.70 and 57,299.40

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Solution

The fourth proportional to 99,289.80, 148,934.70 and 57,299.40 is: 85,949.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,289.80 : 148,934.70 = 57,299.40 : x
  2. Step 2: Convert to fraction form
    99,289.80/148,934.70 = 57,299.40/x
  3. Step 3: Cross multiply
    99,289.80x = 148,934.70 × 57,299.40
  4. Step 4: Simplify right side
    99,289.80x = 8,533,868,949.18
  5. Step 5: Solve for x
    x = 8,533,868,949.18/99,289.80
  6. Step 6: Final answer
    x = 85,949.10

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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.