Home / 85,875.12-128,810.36-38,477.34

Finding the Fourth Proportional to 85,875.12, 128,810.36 and 38,477.34

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Solution

The fourth proportional to 85,875.12, 128,810.36 and 38,477.34 is: 57,714.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,875.12 : 128,810.36 = 38,477.34 : x
  2. Step 2: Convert to fraction form
    85,875.12/128,810.36 = 38,477.34/x
  3. Step 3: Cross multiply
    85,875.12x = 128,810.36 × 38,477.34
  4. Step 4: Simplify right side
    85,875.12x = 4,956,280,017.24
  5. Step 5: Solve for x
    x = 4,956,280,017.24/85,875.12
  6. Step 6: Final answer
    x = 57,714.97

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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.