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Finding the Fourth Proportional to 105,124.50, 145,071.95 and 67,398.75

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Solution

The fourth proportional to 105,124.50, 145,071.95 and 67,398.75 is: 93,010.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,124.50 : 145,071.95 = 67,398.75 : x
  2. Step 2: Convert to fraction form
    105,124.50/145,071.95 = 67,398.75/x
  3. Step 3: Cross multiply
    105,124.50x = 145,071.95 × 67,398.75
  4. Step 4: Simplify right side
    105,124.50x = 9,777,667,753.07
  5. Step 5: Solve for x
    x = 9,777,667,753.07/105,124.50
  6. Step 6: Final answer
    x = 93,010.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.