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Finding the Fourth Proportional to 145,783.80, 218,610.90 and 57,007.80

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Solution

The fourth proportional to 145,783.80, 218,610.90 and 57,007.80 is: 85,486.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,783.80 : 218,610.90 = 57,007.80 : x
  2. Step 2: Convert to fraction form
    145,783.80/218,610.90 = 57,007.80/x
  3. Step 3: Cross multiply
    145,783.80x = 218,610.90 × 57,007.80
  4. Step 4: Simplify right side
    145,783.80x = 12,462,526,465.02
  5. Step 5: Solve for x
    x = 12,462,526,465.02/145,783.80
  6. Step 6: Final answer
    x = 85,486.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.