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Finding the Fourth Proportional to 128,272.54, 177,000.77 and 70,904.11

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Solution

The fourth proportional to 128,272.54, 177,000.77 and 70,904.11 is: 97,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,272.54 : 177,000.77 = 70,904.11 : x
  2. Step 2: Convert to fraction form
    128,272.54/177,000.77 = 70,904.11/x
  3. Step 3: Cross multiply
    128,272.54x = 177,000.77 × 70,904.11
  4. Step 4: Simplify right side
    128,272.54x = 12,550,082,066.16
  5. Step 5: Solve for x
    x = 12,550,082,066.16/128,272.54
  6. Step 6: Final answer
    x = 97,839.20

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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.