Home / 138,137.04-190,611.18-77,705.64

Finding the Fourth Proportional to 138,137.04, 190,611.18 and 77,705.64

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Solution

The fourth proportional to 138,137.04, 190,611.18 and 77,705.64 is: 107,223.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,137.04 : 190,611.18 = 77,705.64 : x
  2. Step 2: Convert to fraction form
    138,137.04/190,611.18 = 77,705.64/x
  3. Step 3: Cross multiply
    138,137.04x = 190,611.18 × 77,705.64
  4. Step 4: Simplify right side
    138,137.04x = 14,811,563,733.06
  5. Step 5: Solve for x
    x = 14,811,563,733.06/138,137.04
  6. Step 6: Final answer
    x = 107,223.69

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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.