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Finding the Fourth Proportional to 85,688.92, 128,365.98 and 59,030.20

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Solution

The fourth proportional to 85,688.92, 128,365.98 and 59,030.20 is: 88,429.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,688.92 : 128,365.98 = 59,030.20 : x
  2. Step 2: Convert to fraction form
    85,688.92/128,365.98 = 59,030.20/x
  3. Step 3: Cross multiply
    85,688.92x = 128,365.98 × 59,030.20
  4. Step 4: Simplify right side
    85,688.92x = 7,577,469,472.60
  5. Step 5: Solve for x
    x = 7,577,469,472.60/85,688.92
  6. Step 6: Final answer
    x = 88,429.98

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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.