Home / 78,075.12-107,719.80-47,849.36

Finding the Fourth Proportional to 78,075.12, 107,719.80 and 47,849.36

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Solution

The fourth proportional to 78,075.12, 107,719.80 and 47,849.36 is: 66,017.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,075.12 : 107,719.80 = 47,849.36 : x
  2. Step 2: Convert to fraction form
    78,075.12/107,719.80 = 47,849.36/x
  3. Step 3: Cross multiply
    78,075.12x = 107,719.80 × 47,849.36
  4. Step 4: Simplify right side
    78,075.12x = 5,154,323,489.33
  5. Step 5: Solve for x
    x = 5,154,323,489.33/78,075.12
  6. Step 6: Final answer
    x = 66,017.49

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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.