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Finding the Fourth Proportional to 120,420.61, 180,578.57 and 64,248.19

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Solution

The fourth proportional to 120,420.61, 180,578.57 and 64,248.19 is: 96,344.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,420.61 : 180,578.57 = 64,248.19 : x
  2. Step 2: Convert to fraction form
    120,420.61/180,578.57 = 64,248.19/x
  3. Step 3: Cross multiply
    120,420.61x = 180,578.57 × 64,248.19
  4. Step 4: Simplify right side
    120,420.61x = 11,601,845,502.60
  5. Step 5: Solve for x
    x = 11,601,845,502.60/120,420.61
  6. Step 6: Final answer
    x = 96,344.35

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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.