Home / 128,047.02-176,736.60-77,788.14

Finding the Fourth Proportional to 128,047.02, 176,736.60 and 77,788.14

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Solution

The fourth proportional to 128,047.02, 176,736.60 and 77,788.14 is: 107,366.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.02 : 176,736.60 = 77,788.14 : x
  2. Step 2: Convert to fraction form
    128,047.02/176,736.60 = 77,788.14/x
  3. Step 3: Cross multiply
    128,047.02x = 176,736.60 × 77,788.14
  4. Step 4: Simplify right side
    128,047.02x = 13,748,011,383.92
  5. Step 5: Solve for x
    x = 13,748,011,383.92/128,047.02
  6. Step 6: Final answer
    x = 107,366.90

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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.