Home / 64,988.20-89,646.30-39,128.77

Finding the Fourth Proportional to 64,988.20, 89,646.30 and 39,128.77

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Solution

The fourth proportional to 64,988.20, 89,646.30 and 39,128.77 is: 53,975.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,988.20 : 89,646.30 = 39,128.77 : x
  2. Step 2: Convert to fraction form
    64,988.20/89,646.30 = 39,128.77/x
  3. Step 3: Cross multiply
    64,988.20x = 89,646.30 × 39,128.77
  4. Step 4: Simplify right side
    64,988.20x = 3,507,749,454.05
  5. Step 5: Solve for x
    x = 3,507,749,454.05/64,988.20
  6. Step 6: Final answer
    x = 53,975.17

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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.