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Finding the Fourth Proportional to 81,681.94, 112,628.64 and 58,980.88

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Solution

The fourth proportional to 81,681.94, 112,628.64 and 58,980.88 is: 81,326.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,681.94 : 112,628.64 = 58,980.88 : x
  2. Step 2: Convert to fraction form
    81,681.94/112,628.64 = 58,980.88/x
  3. Step 3: Cross multiply
    81,681.94x = 112,628.64 × 58,980.88
  4. Step 4: Simplify right side
    81,681.94x = 6,642,936,300.40
  5. Step 5: Solve for x
    x = 6,642,936,300.40/81,681.94
  6. Step 6: Final answer
    x = 81,326.87

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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.