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Finding the Fourth Proportional to 81,597.98, 112,515.27 and 56,403.74

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Solution

The fourth proportional to 81,597.98, 112,515.27 and 56,403.74 is: 77,774.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,597.98 : 112,515.27 = 56,403.74 : x
  2. Step 2: Convert to fraction form
    81,597.98/112,515.27 = 56,403.74/x
  3. Step 3: Cross multiply
    81,597.98x = 112,515.27 × 56,403.74
  4. Step 4: Simplify right side
    81,597.98x = 6,346,282,035.11
  5. Step 5: Solve for x
    x = 6,346,282,035.11/81,597.98
  6. Step 6: Final answer
    x = 77,774.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.