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Finding the Fourth Proportional to 92,859.42, 128,143.65 and 52,572.90

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Solution

The fourth proportional to 92,859.42, 128,143.65 and 52,572.90 is: 72,549.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,859.42 : 128,143.65 = 52,572.90 : x
  2. Step 2: Convert to fraction form
    92,859.42/128,143.65 = 52,572.90/x
  3. Step 3: Cross multiply
    92,859.42x = 128,143.65 × 52,572.90
  4. Step 4: Simplify right side
    92,859.42x = 6,736,883,297.09
  5. Step 5: Solve for x
    x = 6,736,883,297.09/92,859.42
  6. Step 6: Final answer
    x = 72,549.27

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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.