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Finding the Fourth Proportional to 128,021.02, 176,700.63 and 77,762.14

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Solution

The fourth proportional to 128,021.02, 176,700.63 and 77,762.14 is: 107,330.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.02 : 176,700.63 = 77,762.14 : x
  2. Step 2: Convert to fraction form
    128,021.02/176,700.63 = 77,762.14/x
  3. Step 3: Cross multiply
    128,021.02x = 176,700.63 × 77,762.14
  4. Step 4: Simplify right side
    128,021.02x = 13,740,619,128.15
  5. Step 5: Solve for x
    x = 13,740,619,128.15/128,021.02
  6. Step 6: Final answer
    x = 107,330.96

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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.