Home / 128,147.14-176,842.35-70,790.40

Finding the Fourth Proportional to 128,147.14, 176,842.35 and 70,790.40

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Solution

The fourth proportional to 128,147.14, 176,842.35 and 70,790.40 is: 97,690.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,147.14 : 176,842.35 = 70,790.40 : x
  2. Step 2: Convert to fraction form
    128,147.14/176,842.35 = 70,790.40/x
  3. Step 3: Cross multiply
    128,147.14x = 176,842.35 × 70,790.40
  4. Step 4: Simplify right side
    128,147.14x = 12,518,740,339.49
  5. Step 5: Solve for x
    x = 12,518,740,339.49/128,147.14
  6. Step 6: Final answer
    x = 97,690.36

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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.