Home / 55,128.39-76,075.36-30,927.88

Finding the Fourth Proportional to 55,128.39, 76,075.36 and 30,927.88

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Solution

The fourth proportional to 55,128.39, 76,075.36 and 30,927.88 is: 42,679.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,128.39 : 76,075.36 = 30,927.88 : x
  2. Step 2: Convert to fraction form
    55,128.39/76,075.36 = 30,927.88/x
  3. Step 3: Cross multiply
    55,128.39x = 76,075.36 × 30,927.88
  4. Step 4: Simplify right side
    55,128.39x = 2,352,849,605.04
  5. Step 5: Solve for x
    x = 2,352,849,605.04/55,128.39
  6. Step 6: Final answer
    x = 42,679.45

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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.