Home / 265,730.28-398,596.86-78,743.40

Finding the Fourth Proportional to 265,730.28, 398,596.86 and 78,743.40

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Solution

The fourth proportional to 265,730.28, 398,596.86 and 78,743.40 is: 118,115.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,730.28 : 398,596.86 = 78,743.40 : x
  2. Step 2: Convert to fraction form
    265,730.28/398,596.86 = 78,743.40/x
  3. Step 3: Cross multiply
    265,730.28x = 398,596.86 × 78,743.40
  4. Step 4: Simplify right side
    265,730.28x = 31,386,871,985.72
  5. Step 5: Solve for x
    x = 31,386,871,985.72/265,730.28
  6. Step 6: Final answer
    x = 118,115.53

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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.