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Finding the Fourth Proportional to 101,152, 139,589.76 and 56,440.32

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Solution

The fourth proportional to 101,152, 139,589.76 and 56,440.32 is: 77,887.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,152 : 139,589.76 = 56,440.32 : x
  2. Step 2: Convert to fraction form
    101,152/139,589.76 = 56,440.32/x
  3. Step 3: Cross multiply
    101,152x = 139,589.76 × 56,440.32
  4. Step 4: Simplify right side
    101,152x = 7,878,490,723.12
  5. Step 5: Solve for x
    x = 7,878,490,723.12/101,152
  6. Step 6: Final answer
    x = 77,887.64

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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.