Home / 145,421.21-218,248.47-75,320.57

Finding the Fourth Proportional to 145,421.21, 218,248.47 and 75,320.57

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Solution

The fourth proportional to 145,421.21, 218,248.47 and 75,320.57 is: 113,041.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,421.21 : 218,248.47 = 75,320.57 : x
  2. Step 2: Convert to fraction form
    145,421.21/218,248.47 = 75,320.57/x
  3. Step 3: Cross multiply
    145,421.21x = 218,248.47 × 75,320.57
  4. Step 4: Simplify right side
    145,421.21x = 16,438,599,162.03
  5. Step 5: Solve for x
    x = 16,438,599,162.03/145,421.21
  6. Step 6: Final answer
    x = 113,041.28

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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.