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Finding the Fourth Proportional to 86,425.79, 129,657.71 and 26,454.74

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Solution

The fourth proportional to 86,425.79, 129,657.71 and 26,454.74 is: 39,687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,425.79 : 129,657.71 = 26,454.74 : x
  2. Step 2: Convert to fraction form
    86,425.79/129,657.71 = 26,454.74/x
  3. Step 3: Cross multiply
    86,425.79x = 129,657.71 × 26,454.74
  4. Step 4: Simplify right side
    86,425.79x = 3,430,060,424.89
  5. Step 5: Solve for x
    x = 3,430,060,424.89/86,425.79
  6. Step 6: Final answer
    x = 39,687.93

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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.