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Finding the Fourth Proportional to 124,075.81, 171,132.87 and 78,714.64

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Solution

The fourth proportional to 124,075.81, 171,132.87 and 78,714.64 is: 108,568.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,075.81 : 171,132.87 = 78,714.64 : x
  2. Step 2: Convert to fraction form
    124,075.81/171,132.87 = 78,714.64/x
  3. Step 3: Cross multiply
    124,075.81x = 171,132.87 × 78,714.64
  4. Step 4: Simplify right side
    124,075.81x = 13,470,662,254.22
  5. Step 5: Solve for x
    x = 13,470,662,254.22/124,075.81
  6. Step 6: Final answer
    x = 108,568.00

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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.