Home / 143,780.55-198,417.95-83,387.00

Finding the Fourth Proportional to 143,780.55, 198,417.95 and 83,387.00

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Solution

The fourth proportional to 143,780.55, 198,417.95 and 83,387.00 is: 115,074.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,780.55 : 198,417.95 = 83,387.00 : x
  2. Step 2: Convert to fraction form
    143,780.55/198,417.95 = 83,387.00/x
  3. Step 3: Cross multiply
    143,780.55x = 198,417.95 × 83,387.00
  4. Step 4: Simplify right side
    143,780.55x = 16,545,477,988.46
  5. Step 5: Solve for x
    x = 16,545,477,988.46/143,780.55
  6. Step 6: Final answer
    x = 115,074.52

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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.