Home / 117,318.81-161,857.53-77,054.40

Finding the Fourth Proportional to 117,318.81, 161,857.53 and 77,054.40

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Solution

The fourth proportional to 117,318.81, 161,857.53 and 77,054.40 is: 106,307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,318.81 : 161,857.53 = 77,054.40 : x
  2. Step 2: Convert to fraction form
    117,318.81/161,857.53 = 77,054.40/x
  3. Step 3: Cross multiply
    117,318.81x = 161,857.53 × 77,054.40
  4. Step 4: Simplify right side
    117,318.81x = 12,471,834,859.63
  5. Step 5: Solve for x
    x = 12,471,834,859.63/117,318.81
  6. Step 6: Final answer
    x = 106,307.21

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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.