Home / 85,931,953.18-128,896,667.70-21,235,756.50

Finding the Fourth Proportional to 85,931,953.18, 128,896,667.70 and 21,235,756.50

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Solution

The fourth proportional to 85,931,953.18, 128,896,667.70 and 21,235,756.50 is: 31,853,322.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931,953.18 : 128,896,667.70 = 21,235,756.50 : x
  2. Step 2: Convert to fraction form
    85,931,953.18/128,896,667.70 = 21,235,756.50/x
  3. Step 3: Cross multiply
    85,931,953.18x = 128,896,667.70 × 21,235,756.50
  4. Step 4: Simplify right side
    85,931,953.18x = 2,737,218,248,938,615
  5. Step 5: Solve for x
    x = 2,737,218,248,938,615/85,931,953.18
  6. Step 6: Final answer
    x = 31,853,322.86

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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.