Home / 128,368.23-177,156.33-71,779.59

Finding the Fourth Proportional to 128,368.23, 177,156.33 and 71,779.59

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Solution

The fourth proportional to 128,368.23, 177,156.33 and 71,779.59 is: 99,060.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.23 : 177,156.33 = 71,779.59 : x
  2. Step 2: Convert to fraction form
    128,368.23/177,156.33 = 71,779.59/x
  3. Step 3: Cross multiply
    128,368.23x = 177,156.33 × 71,779.59
  4. Step 4: Simplify right side
    128,368.23x = 12,716,208,733.30
  5. Step 5: Solve for x
    x = 12,716,208,733.30/128,368.23
  6. Step 6: Final answer
    x = 99,060.40

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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.