Home / 90,715.19-135,307.40-78,775.07

Finding the Fourth Proportional to 90,715.19, 135,307.40 and 78,775.07

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Solution

The fourth proportional to 90,715.19, 135,307.40 and 78,775.07 is: 117,497.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,715.19 : 135,307.40 = 78,775.07 : x
  2. Step 2: Convert to fraction form
    90,715.19/135,307.40 = 78,775.07/x
  3. Step 3: Cross multiply
    90,715.19x = 135,307.40 × 78,775.07
  4. Step 4: Simplify right side
    90,715.19x = 10,658,848,836.11
  5. Step 5: Solve for x
    x = 10,658,848,836.11/90,715.19
  6. Step 6: Final answer
    x = 117,497.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.