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Finding the Fourth Proportional to 187,045.61, 258,123.73 and 105,374.85

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Solution

The fourth proportional to 187,045.61, 258,123.73 and 105,374.85 is: 145,417.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,045.61 : 258,123.73 = 105,374.85 : x
  2. Step 2: Convert to fraction form
    187,045.61/258,123.73 = 105,374.85/x
  3. Step 3: Cross multiply
    187,045.61x = 258,123.73 × 105,374.85
  4. Step 4: Simplify right side
    187,045.61x = 27,199,748,434.73
  5. Step 5: Solve for x
    x = 27,199,748,434.73/187,045.61
  6. Step 6: Final answer
    x = 145,417.73

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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.