Home / 138,779.05-191,518.82-84,312.67

Finding the Fourth Proportional to 138,779.05, 191,518.82 and 84,312.67

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Solution

The fourth proportional to 138,779.05, 191,518.82 and 84,312.67 is: 116,353.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,779.05 : 191,518.82 = 84,312.67 : x
  2. Step 2: Convert to fraction form
    138,779.05/191,518.82 = 84,312.67/x
  3. Step 3: Cross multiply
    138,779.05x = 191,518.82 × 84,312.67
  4. Step 4: Simplify right side
    138,779.05x = 16,147,463,264.44
  5. Step 5: Solve for x
    x = 16,147,463,264.44/138,779.05
  6. Step 6: Final answer
    x = 116,353.76

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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.