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Finding the Fourth Proportional to 76,503.52, 105,545.36 and 56,408.08

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Solution

The fourth proportional to 76,503.52, 105,545.36 and 56,408.08 is: 77,821.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,503.52 : 105,545.36 = 56,408.08 : x
  2. Step 2: Convert to fraction form
    76,503.52/105,545.36 = 56,408.08/x
  3. Step 3: Cross multiply
    76,503.52x = 105,545.36 × 56,408.08
  4. Step 4: Simplify right side
    76,503.52x = 5,953,611,110.51
  5. Step 5: Solve for x
    x = 5,953,611,110.51/76,503.52
  6. Step 6: Final answer
    x = 77,821.40

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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.