Home / 127,979.20-191,709.60-72,510.40

Finding the Fourth Proportional to 127,979.20, 191,709.60 and 72,510.40

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Solution

The fourth proportional to 127,979.20, 191,709.60 and 72,510.40 is: 108,618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,979.20 : 191,709.60 = 72,510.40 : x
  2. Step 2: Convert to fraction form
    127,979.20/191,709.60 = 72,510.40/x
  3. Step 3: Cross multiply
    127,979.20x = 191,709.60 × 72,510.40
  4. Step 4: Simplify right side
    127,979.20x = 13,900,939,779.84
  5. Step 5: Solve for x
    x = 13,900,939,779.84/127,979.20
  6. Step 6: Final answer
    x = 108,618.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.