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Finding the Fourth Proportional to 85,689.42, 128,366.73 and 59,030.70

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Solution

The fourth proportional to 85,689.42, 128,366.73 and 59,030.70 is: 88,430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,689.42 : 128,366.73 = 59,030.70 : x
  2. Step 2: Convert to fraction form
    85,689.42/128,366.73 = 59,030.70/x
  3. Step 3: Cross multiply
    85,689.42x = 128,366.73 × 59,030.70
  4. Step 4: Simplify right side
    85,689.42x = 7,577,577,928.61
  5. Step 5: Solve for x
    x = 7,577,577,928.61/85,689.42
  6. Step 6: Final answer
    x = 88,430.73

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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.