Home / 93,438.36-128,900.12-61,158.78

Finding the Fourth Proportional to 93,438.36, 128,900.12 and 61,158.78

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Solution

The fourth proportional to 93,438.36, 128,900.12 and 61,158.78 is: 84,369.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,438.36 : 128,900.12 = 61,158.78 : x
  2. Step 2: Convert to fraction form
    93,438.36/128,900.12 = 61,158.78/x
  3. Step 3: Cross multiply
    93,438.36x = 128,900.12 × 61,158.78
  4. Step 4: Simplify right side
    93,438.36x = 7,883,373,775.26
  5. Step 5: Solve for x
    x = 7,883,373,775.26/93,438.36
  6. Step 6: Final answer
    x = 84,369.78

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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.