Home / 99,138.02-136,808.29-56,116.65

Finding the Fourth Proportional to 99,138.02, 136,808.29 and 56,116.65

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Solution

The fourth proportional to 99,138.02, 136,808.29 and 56,116.65 is: 77,439.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,138.02 : 136,808.29 = 56,116.65 : x
  2. Step 2: Convert to fraction form
    99,138.02/136,808.29 = 56,116.65/x
  3. Step 3: Cross multiply
    99,138.02x = 136,808.29 × 56,116.65
  4. Step 4: Simplify right side
    99,138.02x = 7,677,222,809.78
  5. Step 5: Solve for x
    x = 7,677,222,809.78/99,138.02
  6. Step 6: Final answer
    x = 77,439.74

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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.