Home / 99,995.40-138,002.18-56,988.05

Finding the Fourth Proportional to 99,995.40, 138,002.18 and 56,988.05

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Solution

The fourth proportional to 99,995.40, 138,002.18 and 56,988.05 is: 78,648.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,995.40 : 138,002.18 = 56,988.05 : x
  2. Step 2: Convert to fraction form
    99,995.40/138,002.18 = 56,988.05/x
  3. Step 3: Cross multiply
    99,995.40x = 138,002.18 × 56,988.05
  4. Step 4: Simplify right side
    99,995.40x = 7,864,474,676.51
  5. Step 5: Solve for x
    x = 7,864,474,676.51/99,995.40
  6. Step 6: Final answer
    x = 78,648.36

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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.