Home / 105,487.31-145,572.65-57,743.68

Finding the Fourth Proportional to 105,487.31, 145,572.65 and 57,743.68

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Solution

The fourth proportional to 105,487.31, 145,572.65 and 57,743.68 is: 79,686.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,487.31 : 145,572.65 = 57,743.68 : x
  2. Step 2: Convert to fraction form
    105,487.31/145,572.65 = 57,743.68/x
  3. Step 3: Cross multiply
    105,487.31x = 145,572.65 × 57,743.68
  4. Step 4: Simplify right side
    105,487.31x = 8,405,900,229.63
  5. Step 5: Solve for x
    x = 8,405,900,229.63/105,487.31
  6. Step 6: Final answer
    x = 79,686.36

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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.