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Finding the Fourth Proportional to 112,389.40, 168,632.70 and 56,985.40

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Solution

The fourth proportional to 112,389.40, 168,632.70 and 56,985.40 is: 85,502.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,389.40 : 168,632.70 = 56,985.40 : x
  2. Step 2: Convert to fraction form
    112,389.40/168,632.70 = 56,985.40/x
  3. Step 3: Cross multiply
    112,389.40x = 168,632.70 × 56,985.40
  4. Step 4: Simplify right side
    112,389.40x = 9,609,601,862.58
  5. Step 5: Solve for x
    x = 9,609,601,862.58/112,389.40
  6. Step 6: Final answer
    x = 85,502.74

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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.