Home / 138,020.01-190,469.51-77,587.12

Finding the Fourth Proportional to 138,020.01, 190,469.51 and 77,587.12

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Solution

The fourth proportional to 138,020.01, 190,469.51 and 77,587.12 is: 107,071.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,020.01 : 190,469.51 = 77,587.12 : x
  2. Step 2: Convert to fraction form
    138,020.01/190,469.51 = 77,587.12/x
  3. Step 3: Cross multiply
    138,020.01x = 190,469.51 × 77,587.12
  4. Step 4: Simplify right side
    138,020.01x = 14,777,980,728.71
  5. Step 5: Solve for x
    x = 14,777,980,728.71/138,020.01
  6. Step 6: Final answer
    x = 107,071.29

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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.