Home / 128,459.04-177,273.63-71,870.46

Finding the Fourth Proportional to 128,459.04, 177,273.63 and 71,870.46

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Solution

The fourth proportional to 128,459.04, 177,273.63 and 71,870.46 is: 99,181.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,459.04 : 177,273.63 = 71,870.46 : x
  2. Step 2: Convert to fraction form
    128,459.04/177,273.63 = 71,870.46/x
  3. Step 3: Cross multiply
    128,459.04x = 177,273.63 × 71,870.46
  4. Step 4: Simplify right side
    128,459.04x = 12,740,737,333.97
  5. Step 5: Solve for x
    x = 12,740,737,333.97/128,459.04
  6. Step 6: Final answer
    x = 99,181.32

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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.