Home / 85,637.40-128,444.76-38,879.52

Finding the Fourth Proportional to 85,637.40, 128,444.76 and 38,879.52

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Solution

The fourth proportional to 85,637.40, 128,444.76 and 38,879.52 is: 58,314.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,637.40 : 128,444.76 = 38,879.52 : x
  2. Step 2: Convert to fraction form
    85,637.40/128,444.76 = 38,879.52/x
  3. Step 3: Cross multiply
    85,637.40x = 128,444.76 × 38,879.52
  4. Step 4: Simplify right side
    85,637.40x = 4,993,870,615.32
  5. Step 5: Solve for x
    x = 4,993,870,615.32/85,637.40
  6. Step 6: Final answer
    x = 58,314.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.