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Finding the Fourth Proportional to 85,637.70, 128,466.15 and 26,472.90

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Solution

The fourth proportional to 85,637.70, 128,466.15 and 26,472.90 is: 39,712.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,637.70 : 128,466.15 = 26,472.90 : x
  2. Step 2: Convert to fraction form
    85,637.70/128,466.15 = 26,472.90/x
  3. Step 3: Cross multiply
    85,637.70x = 128,466.15 × 26,472.90
  4. Step 4: Simplify right side
    85,637.70x = 3,400,871,542.34
  5. Step 5: Solve for x
    x = 3,400,871,542.34/85,637.70
  6. Step 6: Final answer
    x = 39,712.32

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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.