Home / 130,135.51-179,579.55-71,988.77

Finding the Fourth Proportional to 130,135.51, 179,579.55 and 71,988.77

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Solution

The fourth proportional to 130,135.51, 179,579.55 and 71,988.77 is: 99,340.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,135.51 : 179,579.55 = 71,988.77 : x
  2. Step 2: Convert to fraction form
    130,135.51/179,579.55 = 71,988.77/x
  3. Step 3: Cross multiply
    130,135.51x = 179,579.55 × 71,988.77
  4. Step 4: Simplify right side
    130,135.51x = 12,927,711,370.60
  5. Step 5: Solve for x
    x = 12,927,711,370.60/130,135.51
  6. Step 6: Final answer
    x = 99,340.38

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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.