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Finding the Fourth Proportional to 300,075.75, 450,117.95 and 78,459.75

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Solution

The fourth proportional to 300,075.75, 450,117.95 and 78,459.75 is: 117,690.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,075.75 : 450,117.95 = 78,459.75 : x
  2. Step 2: Convert to fraction form
    300,075.75/450,117.95 = 78,459.75/x
  3. Step 3: Cross multiply
    300,075.75x = 450,117.95 × 78,459.75
  4. Step 4: Simplify right side
    300,075.75x = 35,316,141,435.21
  5. Step 5: Solve for x
    x = 35,316,141,435.21/300,075.75
  6. Step 6: Final answer
    x = 117,690.75

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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.