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Finding the Fourth Proportional to 86,594.70, 129,782.70 and 42,125.70

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Solution

The fourth proportional to 86,594.70, 129,782.70 and 42,125.70 is: 63,135.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,594.70 : 129,782.70 = 42,125.70 : x
  2. Step 2: Convert to fraction form
    86,594.70/129,782.70 = 42,125.70/x
  3. Step 3: Cross multiply
    86,594.70x = 129,782.70 × 42,125.70
  4. Step 4: Simplify right side
    86,594.70x = 5,467,187,085.39
  5. Step 5: Solve for x
    x = 5,467,187,085.39/86,594.70
  6. Step 6: Final answer
    x = 63,135.35

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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.