Home / 99,140.48-136,839.12-56,712.32

Finding the Fourth Proportional to 99,140.48, 136,839.12 and 56,712.32

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Solution

The fourth proportional to 99,140.48, 136,839.12 and 56,712.32 is: 78,277.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,140.48 : 136,839.12 = 56,712.32 : x
  2. Step 2: Convert to fraction form
    99,140.48/136,839.12 = 56,712.32/x
  3. Step 3: Cross multiply
    99,140.48x = 136,839.12 × 56,712.32
  4. Step 4: Simplify right side
    99,140.48x = 7,760,463,961.96
  5. Step 5: Solve for x
    x = 7,760,463,961.96/99,140.48
  6. Step 6: Final answer
    x = 78,277.45

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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.