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Finding the Fourth Proportional to 98,967.88, 136,392.53 and 70,288.80

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Solution

The fourth proportional to 98,967.88, 136,392.53 and 70,288.80 is: 96,868.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,967.88 : 136,392.53 = 70,288.80 : x
  2. Step 2: Convert to fraction form
    98,967.88/136,392.53 = 70,288.80/x
  3. Step 3: Cross multiply
    98,967.88x = 136,392.53 × 70,288.80
  4. Step 4: Simplify right side
    98,967.88x = 9,586,866,399.75
  5. Step 5: Solve for x
    x = 9,586,866,399.75/98,967.88
  6. Step 6: Final answer
    x = 96,868.47

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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.