Home / 145,820.40-218,730.60-120,937.20

Finding the Fourth Proportional to 145,820.40, 218,730.60 and 120,937.20

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Solution

The fourth proportional to 145,820.40, 218,730.60 and 120,937.20 is: 181,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,820.40 : 218,730.60 = 120,937.20 : x
  2. Step 2: Convert to fraction form
    145,820.40/218,730.60 = 120,937.20/x
  3. Step 3: Cross multiply
    145,820.40x = 218,730.60 × 120,937.20
  4. Step 4: Simplify right side
    145,820.40x = 26,452,666,318.32
  5. Step 5: Solve for x
    x = 26,452,666,318.32/145,820.40
  6. Step 6: Final answer
    x = 181,405.80

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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.