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Finding the Fourth Proportional to 103,671.84, 143,136 and 79,756.32

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Solution

The fourth proportional to 103,671.84, 143,136 and 79,756.32 is: 110,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,671.84 : 143,136 = 79,756.32 : x
  2. Step 2: Convert to fraction form
    103,671.84/143,136 = 79,756.32/x
  3. Step 3: Cross multiply
    103,671.84x = 143,136 × 79,756.32
  4. Step 4: Simplify right side
    103,671.84x = 11,416,000,619.52
  5. Step 5: Solve for x
    x = 11,416,000,619.52/103,671.84
  6. Step 6: Final answer
    x = 110,116.70

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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.