Home / 245,931.77-339,387-138,503.63

Finding the Fourth Proportional to 245,931.77, 339,387 and 138,503.63

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Solution

The fourth proportional to 245,931.77, 339,387 and 138,503.63 is: 191,135.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,931.77 : 339,387 = 138,503.63 : x
  2. Step 2: Convert to fraction form
    245,931.77/339,387 = 138,503.63/x
  3. Step 3: Cross multiply
    245,931.77x = 339,387 × 138,503.63
  4. Step 4: Simplify right side
    245,931.77x = 47,006,331,474.81
  5. Step 5: Solve for x
    x = 47,006,331,474.81/245,931.77
  6. Step 6: Final answer
    x = 191,135.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.