Home / 129,368.91-178,526.52-72,779.07

Finding the Fourth Proportional to 129,368.91, 178,526.52 and 72,779.07

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Solution

The fourth proportional to 129,368.91, 178,526.52 and 72,779.07 is: 100,433.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,368.91 : 178,526.52 = 72,779.07 : x
  2. Step 2: Convert to fraction form
    129,368.91/178,526.52 = 72,779.07/x
  3. Step 3: Cross multiply
    129,368.91x = 178,526.52 × 72,779.07
  4. Step 4: Simplify right side
    129,368.91x = 12,992,994,095.94
  5. Step 5: Solve for x
    x = 12,992,994,095.94/129,368.91
  6. Step 6: Final answer
    x = 100,433.67

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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.