Home / 105,721.18-145,897.23-57,971.68

Finding the Fourth Proportional to 105,721.18, 145,897.23 and 57,971.68

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Solution

The fourth proportional to 105,721.18, 145,897.23 and 57,971.68 is: 80,002.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,721.18 : 145,897.23 = 57,971.68 : x
  2. Step 2: Convert to fraction form
    105,721.18/145,897.23 = 57,971.68/x
  3. Step 3: Cross multiply
    105,721.18x = 145,897.23 × 57,971.68
  4. Step 4: Simplify right side
    105,721.18x = 8,457,907,530.45
  5. Step 5: Solve for x
    x = 8,457,907,530.45/105,721.18
  6. Step 6: Final answer
    x = 80,002.02

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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.