Home / 105,435.13-145,500.30-57,688.39

Finding the Fourth Proportional to 105,435.13, 145,500.30 and 57,688.39

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Solution

The fourth proportional to 105,435.13, 145,500.30 and 57,688.39 is: 79,609.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,435.13 : 145,500.30 = 57,688.39 : x
  2. Step 2: Convert to fraction form
    105,435.13/145,500.30 = 57,688.39/x
  3. Step 3: Cross multiply
    105,435.13x = 145,500.30 × 57,688.39
  4. Step 4: Simplify right side
    105,435.13x = 8,393,678,051.52
  5. Step 5: Solve for x
    x = 8,393,678,051.52/105,435.13
  6. Step 6: Final answer
    x = 79,609.88

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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.