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Finding the Fourth Proportional to 101,392.16, 139,925.76 and 56,680.16

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Solution

The fourth proportional to 101,392.16, 139,925.76 and 56,680.16 is: 78,221.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,392.16 : 139,925.76 = 56,680.16 : x
  2. Step 2: Convert to fraction form
    101,392.16/139,925.76 = 56,680.16/x
  3. Step 3: Cross multiply
    101,392.16x = 139,925.76 × 56,680.16
  4. Step 4: Simplify right side
    101,392.16x = 7,931,014,464.92
  5. Step 5: Solve for x
    x = 7,931,014,464.92/101,392.16
  6. Step 6: Final answer
    x = 78,221.18

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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.