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Finding the Fourth Proportional to 81,389.16, 112,055.94 and 63,461.16

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Solution

The fourth proportional to 81,389.16, 112,055.94 and 63,461.16 is: 87,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389.16 : 112,055.94 = 63,461.16 : x
  2. Step 2: Convert to fraction form
    81,389.16/112,055.94 = 63,461.16/x
  3. Step 3: Cross multiply
    81,389.16x = 112,055.94 × 63,461.16
  4. Step 4: Simplify right side
    81,389.16x = 7,111,199,937.29
  5. Step 5: Solve for x
    x = 7,111,199,937.29/81,389.16
  6. Step 6: Final answer
    x = 87,372.81

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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.