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Finding the Fourth Proportional to 109,039.70, 153,005.50 and 109,039.70

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Solution

The fourth proportional to 109,039.70, 153,005.50 and 109,039.70 is: 153,005.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,039.70 : 153,005.50 = 109,039.70 : x
  2. Step 2: Convert to fraction form
    109,039.70/153,005.50 = 109,039.70/x
  3. Step 3: Cross multiply
    109,039.70x = 153,005.50 × 109,039.70
  4. Step 4: Simplify right side
    109,039.70x = 16,683,673,818.35
  5. Step 5: Solve for x
    x = 16,683,673,818.35/109,039.70
  6. Step 6: Final answer
    x = 153,005.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.