Home / 136,981.98-189,038.23-80,434.14

Finding the Fourth Proportional to 136,981.98, 189,038.23 and 80,434.14

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Solution

The fourth proportional to 136,981.98, 189,038.23 and 80,434.14 is: 111,000.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,981.98 : 189,038.23 = 80,434.14 : x
  2. Step 2: Convert to fraction form
    136,981.98/189,038.23 = 80,434.14/x
  3. Step 3: Cross multiply
    136,981.98x = 189,038.23 × 80,434.14
  4. Step 4: Simplify right side
    136,981.98x = 15,205,127,457.17
  5. Step 5: Solve for x
    x = 15,205,127,457.17/136,981.98
  6. Step 6: Final answer
    x = 111,000.93

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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.