Home / 128,145.58-176,840.19-70,788.85

Finding the Fourth Proportional to 128,145.58, 176,840.19 and 70,788.85

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Solution

The fourth proportional to 128,145.58, 176,840.19 and 70,788.85 is: 97,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.58 : 176,840.19 = 70,788.85 : x
  2. Step 2: Convert to fraction form
    128,145.58/176,840.19 = 70,788.85/x
  3. Step 3: Cross multiply
    128,145.58x = 176,840.19 × 70,788.85
  4. Step 4: Simplify right side
    128,145.58x = 12,518,313,507.24
  5. Step 5: Solve for x
    x = 12,518,313,507.24/128,145.58
  6. Step 6: Final answer
    x = 97,688.22

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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.