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Finding the Fourth Proportional to 104,987.31, 144,823.98 and 72,740.80

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Solution

The fourth proportional to 104,987.31, 144,823.98 and 72,740.80 is: 100,341.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,987.31 : 144,823.98 = 72,740.80 : x
  2. Step 2: Convert to fraction form
    104,987.31/144,823.98 = 72,740.80/x
  3. Step 3: Cross multiply
    104,987.31x = 144,823.98 × 72,740.80
  4. Step 4: Simplify right side
    104,987.31x = 10,534,612,618.19
  5. Step 5: Solve for x
    x = 10,534,612,618.19/104,987.31
  6. Step 6: Final answer
    x = 100,341.77

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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.