Home / 100,071.32-138,075.82-59,777.20

Finding the Fourth Proportional to 100,071.32, 138,075.82 and 59,777.20

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Solution

The fourth proportional to 100,071.32, 138,075.82 and 59,777.20 is: 82,479.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,071.32 : 138,075.82 = 59,777.20 : x
  2. Step 2: Convert to fraction form
    100,071.32/138,075.82 = 59,777.20/x
  3. Step 3: Cross multiply
    100,071.32x = 138,075.82 × 59,777.20
  4. Step 4: Simplify right side
    100,071.32x = 8,253,785,412.67
  5. Step 5: Solve for x
    x = 8,253,785,412.67/100,071.32
  6. Step 6: Final answer
    x = 82,479.03

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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.