Home / 91,389.94-126,117.40-51,103.78

Finding the Fourth Proportional to 91,389.94, 126,117.40 and 51,103.78

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Solution

The fourth proportional to 91,389.94, 126,117.40 and 51,103.78 is: 70,522.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,389.94 : 126,117.40 = 51,103.78 : x
  2. Step 2: Convert to fraction form
    91,389.94/126,117.40 = 51,103.78/x
  3. Step 3: Cross multiply
    91,389.94x = 126,117.40 × 51,103.78
  4. Step 4: Simplify right side
    91,389.94x = 6,445,075,863.77
  5. Step 5: Solve for x
    x = 6,445,075,863.77/91,389.94
  6. Step 6: Final answer
    x = 70,522.82

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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.