Home / 138,018.16-190,451.82-77,574.88

Finding the Fourth Proportional to 138,018.16, 190,451.82 and 77,574.88

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Solution

The fourth proportional to 138,018.16, 190,451.82 and 77,574.88 is: 107,045.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,018.16 : 190,451.82 = 77,574.88 : x
  2. Step 2: Convert to fraction form
    138,018.16/190,451.82 = 77,574.88/x
  3. Step 3: Cross multiply
    138,018.16x = 190,451.82 × 77,574.88
  4. Step 4: Simplify right side
    138,018.16x = 14,774,277,082.28
  5. Step 5: Solve for x
    x = 14,774,277,082.28/138,018.16
  6. Step 6: Final answer
    x = 107,045.89

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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.