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Finding the Fourth Proportional to 59,881.60, 89,822.40 and 20,429.20

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Solution

The fourth proportional to 59,881.60, 89,822.40 and 20,429.20 is: 30,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,881.60 : 89,822.40 = 20,429.20 : x
  2. Step 2: Convert to fraction form
    59,881.60/89,822.40 = 20,429.20/x
  3. Step 3: Cross multiply
    59,881.60x = 89,822.40 × 20,429.20
  4. Step 4: Simplify right side
    59,881.60x = 1,834,999,774.08
  5. Step 5: Solve for x
    x = 1,834,999,774.08/59,881.60
  6. Step 6: Final answer
    x = 30,643.80

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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.