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Finding the Fourth Proportional to 255,117.60, 382,660.20 and 86,637.60

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Solution

The fourth proportional to 255,117.60, 382,660.20 and 86,637.60 is: 129,950.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,117.60 : 382,660.20 = 86,637.60 : x
  2. Step 2: Convert to fraction form
    255,117.60/382,660.20 = 86,637.60/x
  3. Step 3: Cross multiply
    255,117.60x = 382,660.20 × 86,637.60
  4. Step 4: Simplify right side
    255,117.60x = 33,152,761,343.52
  5. Step 5: Solve for x
    x = 33,152,761,343.52/255,117.60
  6. Step 6: Final answer
    x = 129,950.90

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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.