Home / 137,712.66-189,995.63-86,729.59

Finding the Fourth Proportional to 137,712.66, 189,995.63 and 86,729.59

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Solution

The fourth proportional to 137,712.66, 189,995.63 and 86,729.59 is: 119,656.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,712.66 : 189,995.63 = 86,729.59 : x
  2. Step 2: Convert to fraction form
    137,712.66/189,995.63 = 86,729.59/x
  3. Step 3: Cross multiply
    137,712.66x = 189,995.63 × 86,729.59
  4. Step 4: Simplify right side
    137,712.66x = 16,478,241,826.81
  5. Step 5: Solve for x
    x = 16,478,241,826.81/137,712.66
  6. Step 6: Final answer
    x = 119,656.70

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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.