Home / 100,088.08-138,130.92-55,390.48

Finding the Fourth Proportional to 100,088.08, 138,130.92 and 55,390.48

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Solution

The fourth proportional to 100,088.08, 138,130.92 and 55,390.48 is: 76,444.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,088.08 : 138,130.92 = 55,390.48 : x
  2. Step 2: Convert to fraction form
    100,088.08/138,130.92 = 55,390.48/x
  3. Step 3: Cross multiply
    100,088.08x = 138,130.92 × 55,390.48
  4. Step 4: Simplify right side
    100,088.08x = 7,651,137,961.64
  5. Step 5: Solve for x
    x = 7,651,137,961.64/100,088.08
  6. Step 6: Final answer
    x = 76,444.05

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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.