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Finding the Fourth Proportional to 128,066.95, 176,731.56 and 70,709.84

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Solution

The fourth proportional to 128,066.95, 176,731.56 and 70,709.84 is: 97,579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.95 : 176,731.56 = 70,709.84 : x
  2. Step 2: Convert to fraction form
    128,066.95/176,731.56 = 70,709.84/x
  3. Step 3: Cross multiply
    128,066.95x = 176,731.56 × 70,709.84
  4. Step 4: Simplify right side
    128,066.95x = 12,496,661,302.62
  5. Step 5: Solve for x
    x = 12,496,661,302.62/128,066.95
  6. Step 6: Final answer
    x = 97,579.13

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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.