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Finding the Fourth Proportional to 92,775.76, 128,097.12 and 57,013.72

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Solution

The fourth proportional to 92,775.76, 128,097.12 and 57,013.72 is: 78,719.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,775.76 : 128,097.12 = 57,013.72 : x
  2. Step 2: Convert to fraction form
    92,775.76/128,097.12 = 57,013.72/x
  3. Step 3: Cross multiply
    92,775.76x = 128,097.12 × 57,013.72
  4. Step 4: Simplify right side
    92,775.76x = 7,303,293,332.49
  5. Step 5: Solve for x
    x = 7,303,293,332.49/92,775.76
  6. Step 6: Final answer
    x = 78,719.84

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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.