Home / 128,145.22-176,836.79-70,783.40

Finding the Fourth Proportional to 128,145.22, 176,836.79 and 70,783.40

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Solution

The fourth proportional to 128,145.22, 176,836.79 and 70,783.40 is: 97,679.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.22 : 176,836.79 = 70,783.40 : x
  2. Step 2: Convert to fraction form
    128,145.22/176,836.79 = 70,783.40/x
  3. Step 3: Cross multiply
    128,145.22x = 176,836.79 × 70,783.40
  4. Step 4: Simplify right side
    128,145.22x = 12,517,109,506.42
  5. Step 5: Solve for x
    x = 12,517,109,506.42/128,145.22
  6. Step 6: Final answer
    x = 97,679.10

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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.