Home / 138,064.56-190,518.36-77,623.92

Finding the Fourth Proportional to 138,064.56, 190,518.36 and 77,623.92

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Solution

The fourth proportional to 138,064.56, 190,518.36 and 77,623.92 is: 107,114.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,064.56 : 190,518.36 = 77,623.92 : x
  2. Step 2: Convert to fraction form
    138,064.56/190,518.36 = 77,623.92/x
  3. Step 3: Cross multiply
    138,064.56x = 190,518.36 × 77,623.92
  4. Step 4: Simplify right side
    138,064.56x = 14,788,781,935.17
  5. Step 5: Solve for x
    x = 14,788,781,935.17/138,064.56
  6. Step 6: Final answer
    x = 107,114.98

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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.