Home / 102,421.88-141,342.79-57,102.71

Finding the Fourth Proportional to 102,421.88, 141,342.79 and 57,102.71

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Solution

The fourth proportional to 102,421.88, 141,342.79 and 57,102.71 is: 78,802.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,421.88 : 141,342.79 = 57,102.71 : x
  2. Step 2: Convert to fraction form
    102,421.88/141,342.79 = 57,102.71/x
  3. Step 3: Cross multiply
    102,421.88x = 141,342.79 × 57,102.71
  4. Step 4: Simplify right side
    102,421.88x = 8,071,055,498.49
  5. Step 5: Solve for x
    x = 8,071,055,498.49/102,421.88
  6. Step 6: Final answer
    x = 78,802.07

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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.