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Finding the Fourth Proportional to 68,490.56, 94,510.34 and 42,988.78

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Solution

The fourth proportional to 68,490.56, 94,510.34 and 42,988.78 is: 59,320.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,490.56 : 94,510.34 = 42,988.78 : x
  2. Step 2: Convert to fraction form
    68,490.56/94,510.34 = 42,988.78/x
  3. Step 3: Cross multiply
    68,490.56x = 94,510.34 × 42,988.78
  4. Step 4: Simplify right side
    68,490.56x = 4,062,883,988.58
  5. Step 5: Solve for x
    x = 4,062,883,988.58/68,490.56
  6. Step 6: Final answer
    x = 59,320.35

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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.