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Finding the Fourth Proportional to 123,075.40, 184,613.10 and 78,752.20

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Solution

The fourth proportional to 123,075.40, 184,613.10 and 78,752.20 is: 118,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,075.40 : 184,613.10 = 78,752.20 : x
  2. Step 2: Convert to fraction form
    123,075.40/184,613.10 = 78,752.20/x
  3. Step 3: Cross multiply
    123,075.40x = 184,613.10 × 78,752.20
  4. Step 4: Simplify right side
    123,075.40x = 14,538,687,773.82
  5. Step 5: Solve for x
    x = 14,538,687,773.82/123,075.40
  6. Step 6: Final answer
    x = 118,128.30

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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.