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Finding the Fourth Proportional to 268,603.16, 402,909.39 and 91,114.74

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Solution

The fourth proportional to 268,603.16, 402,909.39 and 91,114.74 is: 136,673.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,603.16 : 402,909.39 = 91,114.74 : x
  2. Step 2: Convert to fraction form
    268,603.16/402,909.39 = 91,114.74/x
  3. Step 3: Cross multiply
    268,603.16x = 402,909.39 × 91,114.74
  4. Step 4: Simplify right side
    268,603.16x = 36,710,984,313.41
  5. Step 5: Solve for x
    x = 36,710,984,313.41/268,603.16
  6. Step 6: Final answer
    x = 136,673.69

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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.