Home / 71,985.10-99,339.37-40,153.98

Finding the Fourth Proportional to 71,985.10, 99,339.37 and 40,153.98

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Solution

The fourth proportional to 71,985.10, 99,339.37 and 40,153.98 is: 55,412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.10 : 99,339.37 = 40,153.98 : x
  2. Step 2: Convert to fraction form
    71,985.10/99,339.37 = 40,153.98/x
  3. Step 3: Cross multiply
    71,985.10x = 99,339.37 × 40,153.98
  4. Step 4: Simplify right side
    71,985.10x = 3,988,871,076.19
  5. Step 5: Solve for x
    x = 3,988,871,076.19/71,985.10
  6. Step 6: Final answer
    x = 55,412.45

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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.