Home / 85,312.07-128,046.65-43,221.43

Finding the Fourth Proportional to 85,312.07, 128,046.65 and 43,221.43

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Solution

The fourth proportional to 85,312.07, 128,046.65 and 43,221.43 is: 64,871.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,312.07 : 128,046.65 = 43,221.43 : x
  2. Step 2: Convert to fraction form
    85,312.07/128,046.65 = 43,221.43/x
  3. Step 3: Cross multiply
    85,312.07x = 128,046.65 × 43,221.43
  4. Step 4: Simplify right side
    85,312.07x = 5,534,359,263.66
  5. Step 5: Solve for x
    x = 5,534,359,263.66/85,312.07
  6. Step 6: Final answer
    x = 64,871.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.