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Finding the Fourth Proportional to 128,002.92, 176,642.76 and 70,642.68

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Solution

The fourth proportional to 128,002.92, 176,642.76 and 70,642.68 is: 97,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.92 : 176,642.76 = 70,642.68 : x
  2. Step 2: Convert to fraction form
    128,002.92/176,642.76 = 70,642.68/x
  3. Step 3: Cross multiply
    128,002.92x = 176,642.76 × 70,642.68
  4. Step 4: Simplify right side
    128,002.92x = 12,478,517,969.00
  5. Step 5: Solve for x
    x = 12,478,517,969.00/128,002.92
  6. Step 6: Final answer
    x = 97,486.20

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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.