Home / 105,670.13-145,707.39-81,416.97

Finding the Fourth Proportional to 105,670.13, 145,707.39 and 81,416.97

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Solution

The fourth proportional to 105,670.13, 145,707.39 and 81,416.97 is: 112,264.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,670.13 : 145,707.39 = 81,416.97 : x
  2. Step 2: Convert to fraction form
    105,670.13/145,707.39 = 81,416.97/x
  3. Step 3: Cross multiply
    105,670.13x = 145,707.39 × 81,416.97
  4. Step 4: Simplify right side
    105,670.13x = 11,863,054,200.41
  5. Step 5: Solve for x
    x = 11,863,054,200.41/105,670.13
  6. Step 6: Final answer
    x = 112,264.98

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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.