Home / 91,728.13-137,631.74-49,637.80

Finding the Fourth Proportional to 91,728.13, 137,631.74 and 49,637.80

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Solution

The fourth proportional to 91,728.13, 137,631.74 and 49,637.80 is: 74,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,728.13 : 137,631.74 = 49,637.80 : x
  2. Step 2: Convert to fraction form
    91,728.13/137,631.74 = 49,637.80/x
  3. Step 3: Cross multiply
    91,728.13x = 137,631.74 × 49,637.80
  4. Step 4: Simplify right side
    91,728.13x = 6,831,736,783.77
  5. Step 5: Solve for x
    x = 6,831,736,783.77/91,728.13
  6. Step 6: Final answer
    x = 74,478.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.