Home / 105,089.40-145,023.11-57,342.74

Finding the Fourth Proportional to 105,089.40, 145,023.11 and 57,342.74

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Solution

The fourth proportional to 105,089.40, 145,023.11 and 57,342.74 is: 79,132.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,089.40 : 145,023.11 = 57,342.74 : x
  2. Step 2: Convert to fraction form
    105,089.40/145,023.11 = 57,342.74/x
  3. Step 3: Cross multiply
    105,089.40x = 145,023.11 × 57,342.74
  4. Step 4: Simplify right side
    105,089.40x = 8,316,021,693.93
  5. Step 5: Solve for x
    x = 8,316,021,693.93/105,089.40
  6. Step 6: Final answer
    x = 79,132.83

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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.