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Finding the Fourth Proportional to 99,303.50, 137,060.66 and 65,315.09

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Solution

The fourth proportional to 99,303.50, 137,060.66 and 65,315.09 is: 90,149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,303.50 : 137,060.66 = 65,315.09 : x
  2. Step 2: Convert to fraction form
    99,303.50/137,060.66 = 65,315.09/x
  3. Step 3: Cross multiply
    99,303.50x = 137,060.66 × 65,315.09
  4. Step 4: Simplify right side
    99,303.50x = 8,952,128,331.48
  5. Step 5: Solve for x
    x = 8,952,128,331.48/99,303.50
  6. Step 6: Final answer
    x = 90,149.18

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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.