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Finding the Fourth Proportional to 67,721.28, 93,461.04 and 39,428.88

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Solution

The fourth proportional to 67,721.28, 93,461.04 and 39,428.88 is: 54,415.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,721.28 : 93,461.04 = 39,428.88 : x
  2. Step 2: Convert to fraction form
    67,721.28/93,461.04 = 39,428.88/x
  3. Step 3: Cross multiply
    67,721.28x = 93,461.04 × 39,428.88
  4. Step 4: Simplify right side
    67,721.28x = 3,685,064,130.84
  5. Step 5: Solve for x
    x = 3,685,064,130.84/67,721.28
  6. Step 6: Final answer
    x = 54,415.16

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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.