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Finding the Fourth Proportional to 255,424.55, 383,168.63 and 86,931.93

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Solution

The fourth proportional to 255,424.55, 383,168.63 and 86,931.93 is: 130,408.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,424.55 : 383,168.63 = 86,931.93 : x
  2. Step 2: Convert to fraction form
    255,424.55/383,168.63 = 86,931.93/x
  3. Step 3: Cross multiply
    255,424.55x = 383,168.63 × 86,931.93
  4. Step 4: Simplify right side
    255,424.55x = 33,309,588,521.36
  5. Step 5: Solve for x
    x = 33,309,588,521.36/255,424.55
  6. Step 6: Final answer
    x = 130,408.72

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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.