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Finding the Fourth Proportional to 303,369.87, 455,051.16 and 78,710.30

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Solution

The fourth proportional to 303,369.87, 455,051.16 and 78,710.30 is: 118,064.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,369.87 : 455,051.16 = 78,710.30 : x
  2. Step 2: Convert to fraction form
    303,369.87/455,051.16 = 78,710.30/x
  3. Step 3: Cross multiply
    303,369.87x = 455,051.16 × 78,710.30
  4. Step 4: Simplify right side
    303,369.87x = 35,817,211,043.69
  5. Step 5: Solve for x
    x = 35,817,211,043.69/303,369.87
  6. Step 6: Final answer
    x = 118,064.50

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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.