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Finding the Fourth Proportional to 365,075.80, 547,695.30 and 128,426.20

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Solution

The fourth proportional to 365,075.80, 547,695.30 and 128,426.20 is: 192,668.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,075.80 : 547,695.30 = 128,426.20 : x
  2. Step 2: Convert to fraction form
    365,075.80/547,695.30 = 128,426.20/x
  3. Step 3: Cross multiply
    365,075.80x = 547,695.30 × 128,426.20
  4. Step 4: Simplify right side
    365,075.80x = 70,338,426,136.86
  5. Step 5: Solve for x
    x = 70,338,426,136.86/365,075.80
  6. Step 6: Final answer
    x = 192,668.01

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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.