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Finding the Fourth Proportional to 93,291.16, 128,745.28 and 53,011.76

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Solution

The fourth proportional to 93,291.16, 128,745.28 and 53,011.76 is: 73,158.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,291.16 : 128,745.28 = 53,011.76 : x
  2. Step 2: Convert to fraction form
    93,291.16/128,745.28 = 53,011.76/x
  3. Step 3: Cross multiply
    93,291.16x = 128,745.28 × 53,011.76
  4. Step 4: Simplify right side
    93,291.16x = 6,825,013,884.49
  5. Step 5: Solve for x
    x = 6,825,013,884.49/93,291.16
  6. Step 6: Final answer
    x = 73,158.21

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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.