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Finding the Fourth Proportional to 104,075.30, 155,882.55 and 85,643.30

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Solution

The fourth proportional to 104,075.30, 155,882.55 and 85,643.30 is: 128,275.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,075.30 : 155,882.55 = 85,643.30 : x
  2. Step 2: Convert to fraction form
    104,075.30/155,882.55 = 85,643.30/x
  3. Step 3: Cross multiply
    104,075.30x = 155,882.55 × 85,643.30
  4. Step 4: Simplify right side
    104,075.30x = 13,350,295,994.42
  5. Step 5: Solve for x
    x = 13,350,295,994.42/104,075.30
  6. Step 6: Final answer
    x = 128,275.35

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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.