Home / 138,362.12-190,925.94-77,931.08

Finding the Fourth Proportional to 138,362.12, 190,925.94 and 77,931.08

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Solution

The fourth proportional to 138,362.12, 190,925.94 and 77,931.08 is: 107,537.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,362.12 : 190,925.94 = 77,931.08 : x
  2. Step 2: Convert to fraction form
    138,362.12/190,925.94 = 77,931.08/x
  3. Step 3: Cross multiply
    138,362.12x = 190,925.94 × 77,931.08
  4. Step 4: Simplify right side
    138,362.12x = 14,879,064,704.22
  5. Step 5: Solve for x
    x = 14,879,064,704.22/138,362.12
  6. Step 6: Final answer
    x = 107,537.13

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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.