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Finding the Fourth Proportional to 105,079.88, 145,009.04 and 57,332.21

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Solution

The fourth proportional to 105,079.88, 145,009.04 and 57,332.21 is: 79,117.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,079.88 : 145,009.04 = 57,332.21 : x
  2. Step 2: Convert to fraction form
    105,079.88/145,009.04 = 57,332.21/x
  3. Step 3: Cross multiply
    105,079.88x = 145,009.04 × 57,332.21
  4. Step 4: Simplify right side
    105,079.88x = 8,313,687,721.47
  5. Step 5: Solve for x
    x = 8,313,687,721.47/105,079.88
  6. Step 6: Final answer
    x = 79,117.79

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1.5x scale

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.