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Finding the Fourth Proportional to 92,869, 128,159.22 and 53,125

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Solution

The fourth proportional to 92,869, 128,159.22 and 53,125 is: 73,312.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,869 : 128,159.22 = 53,125 : x
  2. Step 2: Convert to fraction form
    92,869/128,159.22 = 53,125/x
  3. Step 3: Cross multiply
    92,869x = 128,159.22 × 53,125
  4. Step 4: Simplify right side
    92,869x = 6,808,458,562.50
  5. Step 5: Solve for x
    x = 6,808,458,562.50/92,869
  6. Step 6: Final answer
    x = 73,312.50

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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.