Home / 130,139.64-179,740.32-87,624.36

Finding the Fourth Proportional to 130,139.64, 179,740.32 and 87,624.36

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Solution

The fourth proportional to 130,139.64, 179,740.32 and 87,624.36 is: 121,021.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,139.64 : 179,740.32 = 87,624.36 : x
  2. Step 2: Convert to fraction form
    130,139.64/179,740.32 = 87,624.36/x
  3. Step 3: Cross multiply
    130,139.64x = 179,740.32 × 87,624.36
  4. Step 4: Simplify right side
    130,139.64x = 15,749,630,506.20
  5. Step 5: Solve for x
    x = 15,749,630,506.20/130,139.64
  6. Step 6: Final answer
    x = 121,021.01

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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.