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Finding the Fourth Proportional to 86,430.74, 129,559.98 and 36,523.40

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Solution

The fourth proportional to 86,430.74, 129,559.98 and 36,523.40 is: 54,748.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,430.74 : 129,559.98 = 36,523.40 : x
  2. Step 2: Convert to fraction form
    86,430.74/129,559.98 = 36,523.40/x
  3. Step 3: Cross multiply
    86,430.74x = 129,559.98 × 36,523.40
  4. Step 4: Simplify right side
    86,430.74x = 4,731,970,973.53
  5. Step 5: Solve for x
    x = 4,731,970,973.53/86,430.74
  6. Step 6: Final answer
    x = 54,748.70

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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.