Home / 100,386.03-138,533.24-55,068.20

Finding the Fourth Proportional to 100,386.03, 138,533.24 and 55,068.20

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Solution

The fourth proportional to 100,386.03, 138,533.24 and 55,068.20 is: 75,994.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,386.03 : 138,533.24 = 55,068.20 : x
  2. Step 2: Convert to fraction form
    100,386.03/138,533.24 = 55,068.20/x
  3. Step 3: Cross multiply
    100,386.03x = 138,533.24 × 55,068.20
  4. Step 4: Simplify right side
    100,386.03x = 7,628,776,600.96
  5. Step 5: Solve for x
    x = 7,628,776,600.96/100,386.03
  6. Step 6: Final answer
    x = 75,994.40

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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.