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Finding the Fourth Proportional to 85,373.61, 128,045.97 and 31,327.17

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Solution

The fourth proportional to 85,373.61, 128,045.97 and 31,327.17 is: 46,985.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,373.61 : 128,045.97 = 31,327.17 : x
  2. Step 2: Convert to fraction form
    85,373.61/128,045.97 = 31,327.17/x
  3. Step 3: Cross multiply
    85,373.61x = 128,045.97 × 31,327.17
  4. Step 4: Simplify right side
    85,373.61x = 4,011,317,870.00
  5. Step 5: Solve for x
    x = 4,011,317,870.00/85,373.61
  6. Step 6: Final answer
    x = 46,985.45

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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.