Home / 105,715.40-145,887.18-57,969.52

Finding the Fourth Proportional to 105,715.40, 145,887.18 and 57,969.52

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Solution

The fourth proportional to 105,715.40, 145,887.18 and 57,969.52 is: 79,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,715.40 : 145,887.18 = 57,969.52 : x
  2. Step 2: Convert to fraction form
    105,715.40/145,887.18 = 57,969.52/x
  3. Step 3: Cross multiply
    105,715.40x = 145,887.18 × 57,969.52
  4. Step 4: Simplify right side
    105,715.40x = 8,457,009,798.75
  5. Step 5: Solve for x
    x = 8,457,009,798.75/105,715.40
  6. Step 6: Final answer
    x = 79,997.90

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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.