Home / 91,619.60-137,449.02-28,438.40

Finding the Fourth Proportional to 91,619.60, 137,449.02 and 28,438.40

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Solution

The fourth proportional to 91,619.60, 137,449.02 and 28,438.40 is: 42,663.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,619.60 : 137,449.02 = 28,438.40 : x
  2. Step 2: Convert to fraction form
    91,619.60/137,449.02 = 28,438.40/x
  3. Step 3: Cross multiply
    91,619.60x = 137,449.02 × 28,438.40
  4. Step 4: Simplify right side
    91,619.60x = 3,908,830,210.37
  5. Step 5: Solve for x
    x = 3,908,830,210.37/91,619.60
  6. Step 6: Final answer
    x = 42,663.69

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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.