Home / 98,728.61-136,103.78-70,385.09

Finding the Fourth Proportional to 98,728.61, 136,103.78 and 70,385.09

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Solution

The fourth proportional to 98,728.61, 136,103.78 and 70,385.09 is: 97,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,728.61 : 136,103.78 = 70,385.09 : x
  2. Step 2: Convert to fraction form
    98,728.61/136,103.78 = 70,385.09/x
  3. Step 3: Cross multiply
    98,728.61x = 136,103.78 × 70,385.09
  4. Step 4: Simplify right side
    98,728.61x = 9,579,676,452.71
  5. Step 5: Solve for x
    x = 9,579,676,452.71/98,728.61
  6. Step 6: Final answer
    x = 97,030.40

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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.