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Finding the Fourth Proportional to 91,298.51, 125,989.59 and 51,012.60

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Solution

The fourth proportional to 91,298.51, 125,989.59 and 51,012.60 is: 70,396.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,298.51 : 125,989.59 = 51,012.60 : x
  2. Step 2: Convert to fraction form
    91,298.51/125,989.59 = 51,012.60/x
  3. Step 3: Cross multiply
    91,298.51x = 125,989.59 × 51,012.60
  4. Step 4: Simplify right side
    91,298.51x = 6,427,056,303.77
  5. Step 5: Solve for x
    x = 6,427,056,303.77/91,298.51
  6. Step 6: Final answer
    x = 70,396.07

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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.