Home / 78,432.32-117,635.84-28,510.40

Finding the Fourth Proportional to 78,432.32, 117,635.84 and 28,510.40

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Solution

The fourth proportional to 78,432.32, 117,635.84 and 28,510.40 is: 42,761.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.32 : 117,635.84 = 28,510.40 : x
  2. Step 2: Convert to fraction form
    78,432.32/117,635.84 = 28,510.40/x
  3. Step 3: Cross multiply
    78,432.32x = 117,635.84 × 28,510.40
  4. Step 4: Simplify right side
    78,432.32x = 3,353,844,852.74
  5. Step 5: Solve for x
    x = 3,353,844,852.74/78,432.32
  6. Step 6: Final answer
    x = 42,761.01

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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.