Home / 121,271.60-181,864.20-42,388.40

Finding the Fourth Proportional to 121,271.60, 181,864.20 and 42,388.40

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Solution

The fourth proportional to 121,271.60, 181,864.20 and 42,388.40 is: 63,567.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,271.60 : 181,864.20 = 42,388.40 : x
  2. Step 2: Convert to fraction form
    121,271.60/181,864.20 = 42,388.40/x
  3. Step 3: Cross multiply
    121,271.60x = 181,864.20 × 42,388.40
  4. Step 4: Simplify right side
    121,271.60x = 7,708,932,455.28
  5. Step 5: Solve for x
    x = 7,708,932,455.28/121,271.60
  6. Step 6: Final answer
    x = 63,567.50

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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.