Home / 111,075.76-153,125.08-79,189.30

Finding the Fourth Proportional to 111,075.76, 153,125.08 and 79,189.30

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Solution

The fourth proportional to 111,075.76, 153,125.08 and 79,189.30 is: 109,167.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,075.76 : 153,125.08 = 79,189.30 : x
  2. Step 2: Convert to fraction form
    111,075.76/153,125.08 = 79,189.30/x
  3. Step 3: Cross multiply
    111,075.76x = 153,125.08 × 79,189.30
  4. Step 4: Simplify right side
    111,075.76x = 12,125,867,897.64
  5. Step 5: Solve for x
    x = 12,125,867,897.64/111,075.76
  6. Step 6: Final answer
    x = 109,167.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.