Home / 128,678.48-177,567.34-71,317.24

Finding the Fourth Proportional to 128,678.48, 177,567.34 and 71,317.24

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Solution

The fourth proportional to 128,678.48, 177,567.34 and 71,317.24 is: 98,412.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,678.48 : 177,567.34 = 71,317.24 : x
  2. Step 2: Convert to fraction form
    128,678.48/177,567.34 = 71,317.24/x
  3. Step 3: Cross multiply
    128,678.48x = 177,567.34 × 71,317.24
  4. Step 4: Simplify right side
    128,678.48x = 12,663,612,602.94
  5. Step 5: Solve for x
    x = 12,663,612,602.94/128,678.48
  6. Step 6: Final answer
    x = 98,412.82

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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.