Home / 85,607.95-128,442.21-38,218.63

Finding the Fourth Proportional to 85,607.95, 128,442.21 and 38,218.63

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Solution

The fourth proportional to 85,607.95, 128,442.21 and 38,218.63 is: 57,341.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,607.95 : 128,442.21 = 38,218.63 : x
  2. Step 2: Convert to fraction form
    85,607.95/128,442.21 = 38,218.63/x
  3. Step 3: Cross multiply
    85,607.95x = 128,442.21 × 38,218.63
  4. Step 4: Simplify right side
    85,607.95x = 4,908,885,300.37
  5. Step 5: Solve for x
    x = 4,908,885,300.37/85,607.95
  6. Step 6: Final answer
    x = 57,341.47

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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.