Home / 130,709.12-179,203.75-128,347.16

Finding the Fourth Proportional to 130,709.12, 179,203.75 and 128,347.16

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Solution

The fourth proportional to 130,709.12, 179,203.75 and 128,347.16 is: 175,965.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,709.12 : 179,203.75 = 128,347.16 : x
  2. Step 2: Convert to fraction form
    130,709.12/179,203.75 = 128,347.16/x
  3. Step 3: Cross multiply
    130,709.12x = 179,203.75 × 128,347.16
  4. Step 4: Simplify right side
    130,709.12x = 23,000,291,156.96
  5. Step 5: Solve for x
    x = 23,000,291,156.96/130,709.12
  6. Step 6: Final answer
    x = 175,965.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.