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Finding the Fourth Proportional to 101,390.16, 139,883.76 and 61,088.76

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Solution

The fourth proportional to 101,390.16, 139,883.76 and 61,088.76 is: 84,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,390.16 : 139,883.76 = 61,088.76 : x
  2. Step 2: Convert to fraction form
    101,390.16/139,883.76 = 61,088.76/x
  3. Step 3: Cross multiply
    101,390.16x = 139,883.76 × 61,088.76
  4. Step 4: Simplify right side
    101,390.16x = 8,545,325,442.54
  5. Step 5: Solve for x
    x = 8,545,325,442.54/101,390.16
  6. Step 6: Final answer
    x = 84,281.61

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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.