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Finding the Fourth Proportional to 115,306.40, 172,959.60 and 70,205.60

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Solution

The fourth proportional to 115,306.40, 172,959.60 and 70,205.60 is: 105,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,306.40 : 172,959.60 = 70,205.60 : x
  2. Step 2: Convert to fraction form
    115,306.40/172,959.60 = 70,205.60/x
  3. Step 3: Cross multiply
    115,306.40x = 172,959.60 × 70,205.60
  4. Step 4: Simplify right side
    115,306.40x = 12,142,732,493.76
  5. Step 5: Solve for x
    x = 12,142,732,493.76/115,306.40
  6. Step 6: Final answer
    x = 105,308.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.