Home / 99,345.47-137,100.36-56,912.20

Finding the Fourth Proportional to 99,345.47, 137,100.36 and 56,912.20

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Solution

The fourth proportional to 99,345.47, 137,100.36 and 56,912.20 is: 78,540.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,345.47 : 137,100.36 = 56,912.20 : x
  2. Step 2: Convert to fraction form
    99,345.47/137,100.36 = 56,912.20/x
  3. Step 3: Cross multiply
    99,345.47x = 137,100.36 × 56,912.20
  4. Step 4: Simplify right side
    99,345.47x = 7,802,683,323.41
  5. Step 5: Solve for x
    x = 7,802,683,323.41/99,345.47
  6. Step 6: Final answer
    x = 78,540.91

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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.