Home / 85,854.08-128,799.36-26,688.32

Finding the Fourth Proportional to 85,854.08, 128,799.36 and 26,688.32

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Solution

The fourth proportional to 85,854.08, 128,799.36 and 26,688.32 is: 40,038.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,854.08 : 128,799.36 = 26,688.32 : x
  2. Step 2: Convert to fraction form
    85,854.08/128,799.36 = 26,688.32/x
  3. Step 3: Cross multiply
    85,854.08x = 128,799.36 × 26,688.32
  4. Step 4: Simplify right side
    85,854.08x = 3,437,438,535.48
  5. Step 5: Solve for x
    x = 3,437,438,535.48/85,854.08
  6. Step 6: Final answer
    x = 40,038.15

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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.