Home / 100,539.12-149,715.41-99,434.69

Finding the Fourth Proportional to 100,539.12, 149,715.41 and 99,434.69

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Solution

The fourth proportional to 100,539.12, 149,715.41 and 99,434.69 is: 148,070.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,539.12 : 149,715.41 = 99,434.69 : x
  2. Step 2: Convert to fraction form
    100,539.12/149,715.41 = 99,434.69/x
  3. Step 3: Cross multiply
    100,539.12x = 149,715.41 × 99,434.69
  4. Step 4: Simplify right side
    100,539.12x = 14,886,905,536.24
  5. Step 5: Solve for x
    x = 14,886,905,536.24/100,539.12
  6. Step 6: Final answer
    x = 148,070.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.