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Finding the Fourth Proportional to 60,981.90, 91,472.85 and 51,140.40

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Solution

The fourth proportional to 60,981.90, 91,472.85 and 51,140.40 is: 76,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,981.90 : 91,472.85 = 51,140.40 : x
  2. Step 2: Convert to fraction form
    60,981.90/91,472.85 = 51,140.40/x
  3. Step 3: Cross multiply
    60,981.90x = 91,472.85 × 51,140.40
  4. Step 4: Simplify right side
    60,981.90x = 4,677,958,138.14
  5. Step 5: Solve for x
    x = 4,677,958,138.14/60,981.90
  6. Step 6: Final answer
    x = 76,710.60

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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.