Home / 85,434.07-128,154.67-29,312.79

Finding the Fourth Proportional to 85,434.07, 128,154.67 and 29,312.79

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Solution

The fourth proportional to 85,434.07, 128,154.67 and 29,312.79 is: 43,970.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,434.07 : 128,154.67 = 29,312.79 : x
  2. Step 2: Convert to fraction form
    85,434.07/128,154.67 = 29,312.79/x
  3. Step 3: Cross multiply
    85,434.07x = 128,154.67 × 29,312.79
  4. Step 4: Simplify right side
    85,434.07x = 3,756,570,288.46
  5. Step 5: Solve for x
    x = 3,756,570,288.46/85,434.07
  6. Step 6: Final answer
    x = 43,970.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.