Home / 103,125.40-154,688.10-76,881.40

Finding the Fourth Proportional to 103,125.40, 154,688.10 and 76,881.40

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Solution

The fourth proportional to 103,125.40, 154,688.10 and 76,881.40 is: 115,322.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,125.40 : 154,688.10 = 76,881.40 : x
  2. Step 2: Convert to fraction form
    103,125.40/154,688.10 = 76,881.40/x
  3. Step 3: Cross multiply
    103,125.40x = 154,688.10 × 76,881.40
  4. Step 4: Simplify right side
    103,125.40x = 11,892,637,691.34
  5. Step 5: Solve for x
    x = 11,892,637,691.34/103,125.40
  6. Step 6: Final answer
    x = 115,322.10

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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.